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{{Era|HCW}}
{{Status|Canon}}
{{disambig header|the major battle at the end of the [[Human-Covenant War]]|smaller conflicts during the [[post-war era]]|Battle of Earth (disambiguation)}}
{{disambig header|the major battle at the end of the [[Human-Covenant War]]|smaller conflicts during the [[post-war era]]|Battle of Earth (disambiguation)}}
{{Battle infobox
{{Battle infobox
|name    = Battle for Earth
|name    = Battle for Earth
|image    = [[File:H2A - BattleofEarth.png|350px]]
|image    = [[File:Battle for Earth compilation.png|300px]]<br>Clockwise from top left: The [[Fleet of Sacred Consecration]] above the [[European Union]]; [[Alpha-Five]] dropping into [[Mombasa]]; [[John-117]] supposedly at the [[Second Battle of New Mombasa]]; a {{Pattern|Ket|battlecruiser}} over [[Cleveland]]; a [[Phantom]] reinforcing the Covenant in [[Sector Six]]; John-117 and [[Thel 'Vadam]] watch as ''[[Indulgence of Conviction]]'' crash lands into [[Voi]].
|prev    = [[Battle of October 10]]
|prev    = *[[Fall of Reach]] {{c|[[Siege of the Inner Colonies]]}}
|conc    = [[Battle of Installation 05]], [[Fall of High Charity]], [[Onyx Conflict]], [[Battle of Mare Erythraeum]], [[Skirmish on Mona Lisa]],
*[[Operation: FIRST STRIKE]] {{c|[[John-117]]}}
|next    = [[Battle of Installation 00]]
*[[Battle of October 10]] {{c|[[Sol system]]}}
|conflict = [[Human-Covenant War]]
|conc    = *[[Battle of Installation 05]]
|date    = [[2552#October|October 20, 2552]]{{Ref/Site|D=01|M=6|Y=2020|URL=http://halo.bungie.net/News/content.aspx?type=topnews&cid=16989|SiteName=bungie.net|PageName=Bungie Weekly Update 01/23/09}}<ref name="lootcrate2"/> - [[2552#December|December 3, 2552]]<ref name="lootcrate2"/>
**[[Fall of High Charity]]
*[[Onyx Conflict]]
*[[Battle of Mare Erythraeum]]
*[[Skirmish on Mona Lisa]] {{c|isolated engagement}}
*[[Battle of Luna]]
|next    = *[[Battle of Installation 00]]
*[[Operation: SUNSPEAR]] {{c|Post-War}}
|conflict = *[[Human-Covenant War]]
**[[Siege of the Inner Colonies]]
*[[Great Schism]]
|date    = [[2552#October|October 20, 2552]]{{Ref/Site|Id=bungie|D=01|M=6|Y=2020|URL=http://halo.bungie.net/News/content.aspx?type=topnews&cid=16989|Site=bungie.net|Page=Bungie Weekly Update 01/23/09}}{{Ref/Reuse|lootcrate2}} – c. [[2552#December|December 3, 2552]]{{Ref/Note|Id=battleend|While no official date has been given to the end of the Battle for Earth, the currently last known engagement during the battle, the [[Operation: MARSH FLASH]] in [[Arizona]], took place on December 3, although it's still possible that other engagements on some other countries or continents was still occuring after the [[URNA Southwest Campaign]] ended.}}{{Ref/Reuse|lootcrate2}}
|place    = [[Earth]], [[Sol system]]
|place    = [[Earth]], [[Sol system]]
|result  = '''Tactical [[UEG]]/[[Fleet of Retribution]] victory'''
|result  = '''[[UEG]]/[[Fleet of Retribution]] victory'''
*<small>Covenant invasion successfully repelled
*Covenant invasion successfully repelled; most surviving forces flee to [[Installation 00]]
*Heavy casualties on both sides
*Earth brutally [[orbital bombardment|bombarded]]{{Ref/Reuse|Id=H3CN}} but full [[glassing]] averted; parts of [[Africa]] are, including in the excavation of the [[Portal at Voi]]
*Local Flood infestation contained</small>
*Catastrophic reduction of Earth's population{{Ref/Reuse|Id=bestiarum}} and majority of cities destroyed{{Ref/Reuse|Id=HUI1}}
'''Strategic [[Covenant]] victory'''
*Local Flood infestation contained{{Ref/Reuse|Id=H3Flood}}
*<small>Covenant successfully excavate the [[Excession at Voi|Excession]] and reach [[Installation 00]].</small>
|side1 = *{{Icon|UEG}} [[Unified Earth Government|UEG]]
|side1 = *{{Icon|UEG}} [[Unified Earth Government]]
**{{Icon|UNSC HCW}} [[United Nations Space Command|UNSC]]
**{{Icon|UNSC HCW}} [[United Nations Space Command]]
***{{Icon|Army}} [[UNSC Army]]
**[[New Mombasa Police Department]]
***{{Icon|Navy}} [[UNSC Navy]]
**[[Spartan 1.1 faction]]
***[[UNSC Marine Corps]]
***[[UNSC Air Force]]
**{{Icon|NMPD}} [[New Mombasa Police Department|NMPD]]
**[[Civilian]] militias
**[[Civilian]] militias
*[[Covenant separatists]]
***[[Spartan 1.1 faction]]
**[[Fleet of Retribution]] {{C|from [[2552#November|November 3, 2552]] onwards}}
----
|side2 = [[Covenant|The Covenant]]
Post-Great Schism:
*{{Icon|Covenant FB}} [[Covenant separatists]] {{C|from [[2552#November|November 3, 2552]] onwards}}
**[[Fleet of Retribution]]
|side2 = *{{Icon|Covenant FB}} [[Covenant]]
**[[Covenant military]]
***[[Covenant fleet]]
|side3 = *[[Flood]] {{c|briefly on November 17}}
|commanders1 =
|commanders1 =
*[[Secretary of Defense]] [[Paul Huphy Russel]]
*[[Secretary of Defense|SOD]] [[Paul Huphy Russel]]
*[[Fleet Admiral|FADM]] [[Terrence Hood]]  
*[[Fleet Admiral|FADM]] [[Terrence Hood]]  
*FADM [[Joseph Harper]]
*[[Fleet Admiral|FADM]] [[Joseph Harper]]
*[[Major General|MAJ GEN]] [[Nicolas Strauss]]
*[[Major General|MAJ GEN]] [[Nicolas Strauss]]
*[[Admiral|ADM]] [[I. Zhou]]
*[[Admiral|ADM]] [[I. Zhou]]
*[[Say My Name Actual|Unidentified Admiral]]
*[[Admiral|ADM]] [[Say My Name Actual]]
*[[Vice Admiral|VADM]] [[K. Lanba]]
*[[Colonel|COL]] [[James Ackerson]]
*[[Commander|CMDR]] [[Miranda Keyes]]
----
----
*[[Arbiter]] [[Thel 'Vadam]] {{C|post-Great Schism}}
Post-Great Schism:
*[[Shipmaster]] [[Rtas 'Vadum]] {{C|post-Great Schism}}
*[[Arbiter]] [[Thel 'Vadam]]
|side3 = [[Flood]] {{C|Briefly}}
*[[Fleetmaster]] [[Rtas 'Vadum]]
|commanders2 =
|commanders2 =
*The [[Hierarch|High Prophet]] of [[Prophet of Regret|Regret]] {{C|pre-Great Schism}}
Pre-Mombasa:
----
*[[Hierarchs|High]] [[Prophet of Regret]]
*The [[Hierarch|High Prophet]] of [[Prophet of Truth|Truth]]
*[[Shipmaster]] [[Rhul 'Salmutee]]
*The [[Minister of Inquisition]]†
Post-Mombasa:
*[[Chieftain]] [[Cethegus]]
*[[Hierarchs|High]] [[Prophet of Truth]]
*Chieftain [[Hekabe]]<ref name="HLC5">''[[Halo Legendary Crate]]'', [[Halo Legendary Crate/Data Drops|Data Drop #5]]</ref>
*[[Minister of Inquisition]]†
*Shipmaster [[Lepidus]]
*[[Shipmaster]] [[Lepidus]]
*[[Kaidon]] [[Thav 'Sebarim]]{{Ref/Reuse|thav}} {{c|Pre-Great Schism}}
|commanders3 = [[Gravemind]]
|forces1 =
|forces1 =
*[[UNSC Air Force]]
See [[Participants in the Battle for Earth|here for details on participating forces]]
**300 [[orbital defense platform|ODP]]s
*300 [[orbital defense platform|ODP]]s{{Ref/Level|Id=H2TA|Game=Halo 2|Level=The Armory}}
*{{Icon|Army}} [[UNSC Army]]  
*[[UNSC Home Fleet|Home Fleet]]
*{{Icon|Navy}} [[UNSC Navy]]
**Virtually all the remaining fleets{{Ref/Reuse|lootcrate2}}
**[[UNSC Home Fleet]]
***[[Battle Group Omicron]]
***[[Battle Group Omicron]]
****[[UNSC Stalingrad|One]] [[UNSC carrier|carrier]]
***[[Second Fleet]]{{Ref/Reuse|goo204}}
****One [[Marathon-class heavy cruiser|cruiser]]
***[[Third Fleet]]{{Ref/Reuse|lootcrate2}}
****Six [[destroyer]]s
***[[Fifth Fleet]]{{Ref/Reuse|H2CS}}
****One [[UNSC prowler|prowler]]
***[[Seventh Fleet]]{{Ref/Reuse|goo204}}
***At least three [[UNSC frigate|frigates]]
****[[Battle Group Victory]]{{Ref/Reuse|lootcrate2}}
***[[Second Fleet]]
***[[Third Fleet]]
***[[Fifth Fleet]]
****8 [[Marathon-class heavy cruiser|cruisers]]
****67 [[Stalwart-class light frigate|light frigates]]
***[[Seventh Fleet]]
****[[Battle Group Victory]]<ref name="lootcrate2"/>
*****At least 7 [[Charon-class light frigate|light frigates]]<ref name="mythos">''[[Halo Mythos]]'', p. 117</ref>
***[[Sixth Battle Group]]
***[[Sixth Battle Group]]
***[[Sixteenth Fleet]]
***[[Sixteenth Fleet]]{{Ref/Reuse|goo204}}
***[[Sol Defense Group 3/A-5]]
***[[Sol Defense Group 3/A-5]]{{Ref/Reuse|landfall}}
****At least 1 [[Marathon-class heavy cruiser|cruiser]]
***[[Epsilon Eridani Fleet]] remnants
*[[UNSC Marine Corps]]
****[[Battle Group Leviathan]] remnants
----
*Numerous military land and air ground forces
*[[Fleet of Retribution]]
*Numerous civilian assets{{Ref/Reuse|OSFM69}}
**2 {{Class|CAS|assault carrier}}
***''[[Shadow of Intent]]''
**9 {{Class|CCS|battlecruiser}}s
***''[[Pious Inquisitor]]'' {{C|post-Great Schism}}
|forces2 =
*[[Fleet of Sacred Consecration]] {{C|pre-Great Schism}}
**2 {{Class|CAS|assault carrier}}s
***''[[Solemn Penance]]''
***''[[Day of Jubilation]]''
**13 {{Class|CCS|battlecruiser}}s
***''[[Pious Inquisitor]]'' {{C|pre-Great Schism}}
----
----
*The High Prophet of [[Truth's fleet]]
Post-Great Schism:
**Hundreds of Covenant vessels{{fact}}
*[[Fleet of Retribution]]{{Ref/Reuse|H3Flood}}
***[[Forerunner Dreadnought]]
**1+ [[battle group]]
***Multiple {{Class|CAS|assault carrier}}s
*Several ground forces
***At least 1 {{Class|ORS|heavy cruiser}}
**[[Sangheili]]
****''[[Gathering of Praise]]''<ref name="HLC5"/>
|forces2 =
***Multiple {{Class|CCS|battlecruiser}}s
See [[Participants in the Battle for Earth|here for details on participating forces]]
****''[[Harbinger of Piety]]''
*[[Fleet of Sacred Consecration]] {{c|Pre-Mombasa}}
***At least 2 {{Class|CPV|heavy destroyer}}s
**15 ships{{Ref/Reuse|H2CS}}
****''[[Bloodied Spirit]]''
*[[Covenant fleet|Multiple Covenant fleets]] {{c|Post-Mombasa}}
***''[[Twilight Compunction]]''<ref name="HLC5"/>
**[[Truth's fleet|Truth's forces]]
***At least 1 {{Class|CRS|light cruiser}}<ref name=SC2>''[[Halo Legendary Crate]]'', Series 1</ref>
***One [[Truth's fleet#Battle of Mombasa|excavation fleet]]{{Ref/Reuse|waypoint}}
**[[Fleet of Furious Redemption]]
***Over 320 ships{{Ref/Site|Id=truthsfleet|URL=https://twitter.com/halo/status/1192836473340362753|Site=Twitter|Page=#TodayInHalo, 2552 – Aboard the Forerunner dreadnought, the Prophet of Truth arrives in our solar system with the Covenant's largest invasion force in tow and heads towards Earth. #FictionFriday|Y=2014|D=04|M=02}}  {{c|November 8}}
***Several {{Class|CCS|battlecruiser}}s<ref name="up1">''Halo: Uprising'', Issue 1</ref>
****[[High Charity defense fleet]] remnants{{Ref/Reuse|H2GJ}}{{Ref/Reuse|H3CN}}
****''[[Triumphant Declaration]]''
**[[Fleet of Furious Redemption]]{{Ref/Reuse|HUI1}}
|forces3 =
*Numerous ground forces
*''[[Indulgence of Conviction]]''
**[[Jiralhanae]]
*Several [[infection forms]], [[combat forms]], [[carrier forms]] and [[pure forms]].
**[[Sangheili]] {{c|Pre-Great Schism}}
|casual1 = Heavy UEG losses; moderate Fleet of Retribution casualties<ref name="H3CN"/>
**[[Mgalekgolo]]
*At least 2 [[Orbital defense platform]]s
**[[Kig-Yar]]
*Majority of the [[UNSC Home Fleet]]
**[[Unggoy]]
*Civilian losses in the billions{{Ref/Novel|Novel=Halo: Glasslands|chapter=6}}
**[[Yanme'e]]
|casual2 =
**[[Huragok]]
Very heavy losses
|forces3 =*1 captured {{Pattern|Ket|battlecruiser}}{{Ref/Reuse|H3Flood}}
*Majority of the Fleet of Sacred Consecration
*Several [[infection forms]]{{Ref/Reuse|H3Flood}}
*Majority of Truth's fleet
*Several [[combat forms]]{{Ref/Reuse|H3Flood}}
*Several [[carrier forms]]{{Ref/Reuse|H3Flood}}
*Several [[pure forms]]{{Ref/Reuse|H3Flood}}
|casual1 = Extreme{{Ref/Reuse|H3CN}}
*Majority of the [[UNSC Home Fleet|Home Fleet]]{{Ref/Reuse|H3CN}}
*[[Moncton-class orbital weapon platform|2+ ODPs]]{{Ref/Reuse|H2CS}}
*Majority of ground forces
**Unknown number among the Fleet of Retribution
|casual2 =Very heavy
*Massive terrestrial and exoatmospheric losses{{Ref/Reuse|HUI4}}
**Majority of the Fleet of Sacred Consecration
|casual3 = Completely sterilized
|casual3 = Completely sterilized
|civilian1=Civilian losses in the billions{{Ref/Novel|Gla|Chapter=6}}
}}
}}
{{Quote|We ran from them. They followed. We thought they'd never find us... we were wrong.|[[Cortana]]<ref>''[[Halo 2 commercial]]''</ref>}}
{{Series/Battle/Battle for Earth}}
{{Quote|[[UNSC|We]] [[Massacre of the Outer Colonies|ran]] from them. [[Covenant|They]] [[Siege of the Inner Colonies|followed]]. We thought they'd [[Cole Protocol|never find]] [[Earth|us]]... we were wrong.|[[Cortana]]<ref>''[[Halo 2 commercial]]''</ref>}}
 
The '''Battle for Earth''',{{Ref/Reuse|Id=hnbc8}}{{Ref/Reuse|OSFM69}} also referred to as the '''Earth Sustained Defense Campaign''',{{Ref/Reuse|lootcrate2}} was one of the largest, bloodiest and latest engagements fought between the [[Covenant]] and the forces of the [[Unified Earth Government]] (primarily those of the [[United Nations Space Command]]), at the end of the approximately twenty-seven year-long{{Ref/Note|The war was definitely concluded on December 11, 2552 when the Prophet of Truth was killed. However, an official cessation of hostilities did not come until March 3, 2553.}} [[Human-Covenant War]], which took place on and above the planet [[Earth]] from [[2552#October|October 20]] to at least [[2552#December|December 3, 2552]].{{Ref/NoteReuse|battleend}} It was one of the most important battles of the war, as the fate of humanity depended on the survival of its homeworld and seat of its [[UEG|government]].{{Ref/Note|While [[Insurrectionist|not all]] of humanity believes itself to be subject to the UEG, the UEG claims authority over all of humanity.}}
 
Though the invasion took place on a global scale, the most significant conflicts occurred in the [[East African Protectorate]] in the form of three battles fought within and between the cities of [[Mombasa]] and [[Voi]], collectively referred to as the [[First Battle of Mombasa|first]], [[Second Battle of Mombasa|second]], and [[Battle of Voi|third]] battles of Mombasa.{{Ref/Game|Id=HSA|Game=Halo: Spartan Assault|What=co-op introductory cutscene}} The conflict began when the [[Fleet of Sacred Consecration]], under the command of the [[Prophet of Regret]], arrived on October 20 with intentions of traveling through the [[Portal at Voi|portal]] that a [[luminary]] in its possession pointed to. This move was made without the consent of the other two [[Hierarchs]] and in ignorance regarding the status of this planet as [[human]]ity's homeworld. Faced with the full might of the [[UNSC Home Fleet]], it was not long before Regret's [[Solemn Penance|flagship]] fled to [[Installation 05]]. Soon after this, the Prophet of Truth initiated his plans to [[Changing of the Guard|replace]] [[Sangheili]] with [[Jiralhanae]] and assume control over the entirety of the hierarchal triumvirate. The Jiralhanae occupation forces left behind by Regret assumed control of all remaining local Covenant forces on and over New Mombasa by secretly killing all abandoned Sangheili in the city to secure Truth's later arrival following the beginning of the [[Great Schism]]. Later on the next day, a large [[Truth's fleet|Jiralhanae support and excavation fleet]]<!--Halo Waypoint confirms that Truth's fleet arrived on October 21st--> sent by Truth was then dispatched to Mombasa and begin to [[Glassing|glass]] most of [[Republic of Kenya|Kenya,]] alongside the remnants of Regret's fleet while additional Covenant reinforcements continued to appear in the system and began a resurgent and larger assault on the planet.{{Ref/Reuse|waypointvergil}}{{Ref/Reuse|waypoint}}{{Ref/Reuse|lootcrate2}}


The '''Battle for Earth''', also referred to as the '''Earth Sustained Defense Campaign''',<ref name="lootcrate2"/> was one of the largest engagements fought between the [[Covenant]] and the forces of the [[Unified Earth Government]] (primarily those of the [[United Nations Space Command]]), at the end of the approximately twenty-seven year-long<ref group="note">The war was definitely concluded on December 11, 2552 when the Prophet of Truth was killed. However, an official cessation of hostilities did not come until March 3, 2553.</ref> [[Human-Covenant War]], which took place on and above the planet [[Earth]] from [[2552#October|October 20]] to [[2552#December|December 3, 2552]]. It was one of the most important battles of the war, as the fate of humanity depended on the survival of its homeworld and seat of its [[UEG|government]].<ref group="note">While not all of humanity believes itself to be subject to the UEG, the UEG claims authority over all of humanity.</ref>
At this point, the fight for Earth began in earnest. Smaller battles were waged all across the world, from the UEG capital of [[Sydney]], [[Australia]], to [[Cleveland]], [[URNA]], to [[Havana]], Cuba, and to [[Mount Erebus]], [[Antarctica]] and multiple other locations even when the Sangheili and now Jiralhanae-led Covenant forces turned on each other following the beginning of the [[Great Schism]].{{Ref/Reuse|encycearth}}{{Ref/Reuse|HUI1}}{{Ref/Reuse|goo204}}{{Ref/Reuse|lootcrate2}} By November 17 after very hard fighting, most of the Home Fleet had been obliterated by substantial Covenant naval forces loyal to the [[San'Shyuum|Prophets]], including the Prophet of Truth,{{Ref/Reuse|H2GJ}} and the majority of cities were destroyed as well throughout the battle.{{Ref/Reuse|HUI3}} After defenders and the orbital defense grid were overwhelmed, the Earth had been massively devastated by a large Covenant [[orbital bombardment|bombardment]], resulting in catastrophic human casualties.{{Ref/Reuse|H3CN}} It was on this date that the Prophet of Truth himself, aboard the [[Forerunner Dreadnought]] and with [[John-117|Spartan-117]] in tow, arrived and headed straight for the [[Portal at Voi|Excession]], by then fully excavated. Upon interfacing with the [[keyship]], the portal was activated and a large contingent of the remaining Covenant fleet under the Prophet's command departed through the [[Portal at Voi|Portal]] with the intention of activating the [[Halo Array]] from [[Installation 00|the Ark]].{{Ref/Reuse|H3Storm}}


Though the invasion took place on a global scale, the most significant conflicts occurred in the [[East African Protectorate]] in the form of three battles fought within and between the cities of [[Mombasa]] and [[Voi]], collectively referred to as the [[First Battle of Mombasa|first]], [[Second Battle of Mombasa|second]], and [[Battle of Voi|third]] battles of Mombasa.<ref name="HSA">''[[Halo: Spartan Assault]]'', co-op introductory cutscene</ref> The conflict began when the [[Fleet of Sacred Consecration]], under the command of the [[Prophet of Regret]], arrived on October 20 with intentions of traveling through the [[Portal at Voi|portal]] that a [[luminary]] in its possession pointed to. This move was made without the consent of the other two [[Hierarchs]] and in ignorance regarding the status of this planet as humanity's homeworld. Faced with the full might of the UNSC Home Fleet, it was not long before Regret's flagship fled to [[Installation 05]]. Soon after this, the Prophet of Truth initiated his plans to replace [[Sangheili]] with [[Jiralhanae]] and assume control over the entirety of the hierarchal triumvirate. A second [[Truth's Fleet|fleet]], led by Jiralhanae, appeared in the system and quickly assumed control of all local Covenant forces by [[Great Schism|killing all Sangheili]].
Almost immediately after this, the [[Flood]] arrived aboard a [[Indulgence of Conviction|captured]] {{Pattern|Ket|battlecruiser}}, which crashed down in the town of [[Voi]]. A [[battle group]] assigned to the [[Fleet of Retribution]], a [[Covenant separatists|Covenant separatist]] fleet allied with the UNSC against Truth and his loyalists, was permitted to [[glass]] a large portion of [[Kenya]] to prevent the parasite's spread. With the threat from the Flood dealt with and the bulk of Covenant forces gone, several UNSC forces accompanied the Fleet of Retribution in pursuit of Truth.{{Ref/Reuse|H3Flood}} The remainder of UNSC forces remained behind to defend Earth from an expected full-scale Flood invasion and also began a major counteroffensive to eliminate all Covenant that remained.{{Ref/Reuse|H3Flood}}{{Ref/Reuse|lootcrate2}}


At this point, the fight for Earth began in earnest. Smaller battles were waged all across the world, from the UEG capital of [[Sydney]], [[Australia]], to [[Cleveland]], [[URNA]], to [[Havana]], Cuba, and to [[Mount Erebus]], [[Antarctica]] and multiple other locations. By November 17, most of the Home Fleet had been obliterated. It was on this date that the Prophet of Truth himself, aboard the Forerunner Dreadnought and with [[John-117|Spartan-117]] in tow, arrived and headed straight for the [[Portal at Voi|Excession]], by then fully excavated. Upon interfacing with the [[keyship]], the portal was activated and a large contingent of the Covenant fleet departed through the [[Portal at Voi|Portal]] with the intention of activating the [[Halo Array]] from [[Installation 00|the Ark]]. Almost immediately after this, the [[Flood]] arrived aboard a [[Indulgence of Conviction|captured]] {{Class|CCS|battlecruiser}}, which crashed down in the town of [[Voi]]. The [[Fleet of Retribution]], allied with the UNSC against Truth, was permitted to [[glass]] a large portion of [[Africa]] to prevent the parasite's spread. With the threat from the Flood dealt with and the bulk of Covenant forces gone, a lone UNSC frigate accompanied the Fleet of Retribution in pursuit of Truth. The remainder of UNSC forces remained behind to defend Earth from an expected full-scale Flood invasion and also began a major counteroffensive to eliminate all Covenant that remained.<ref name="lootcrate2"/>
Official accounts report that, faced with the potential of human extinction at the hands of an alien hegemony, a significant number of civilians joined the UNSC forces to repel the Covenant throughout the campaign on Earth with many becoming an instrumental part of the war effort.{{Ref/Book|Id=OSFM69|OSFM|Page=69}}{{Ref/Reuse|HUI1}}


==Background==
==Background==
The [[Human-Covenant War]] was a decades-long conflict wherein the Covenant hegemony was determined to exterminate all of humanity at the behest of its three [[Hierarchs]], who mistakenly believed humans' to represent the living embodiment, and thus discreditation, of their [[Covenant religion|religion]]'s [[Forerunners|gods]]. Also a goal of the empire, from long before first contact with humanity, was the location and activation of the [[Halo]] rings. In the aftermath of the [[Fall of Reach]], the UNSC began to pull the majority of its forces back to Earth, with most units assigned to defend Earth's six [[Space elevator|tether cities]].<ref>'''[[Halo: Evolutions - Essential Tales of the Halo Universe]]''', "[[Palace Hotel]]", ''page 367''</ref> The Prophet of Regret learned "Erde-Tyrene" held a portal which led to the Ark and the Prophet of Truth simultaneously discovered the planet's location through other means.
The [[Human-Covenant War]] was a decades-long conflict wherein the Covenant hegemony was determined to exterminate all of humanity at the behest of its three [[Hierarchs]], who falsely considered humans as representing the living embodiment, and thus discreditation, of their [[Covenant religion|religion]]'s [[Forerunners|gods]] at the time of [[2525|their discovery]]. Also a goal of the empire, from long before first contact with humanity, was the location and activation of the [[Halo]] rings.  
 
===Preparations===
In [[2550]], preparing for a possible battle at Earth, the UNSC reactivated the museum ship {{UNSCShip|Crassus}}.{{Ref/Reuse|CFStrike}}
 
In the aftermath of the [[Fall of Reach]], the UNSC began to pull the majority of its forces back to Earth, with most units assigned to defend Earth's six [[Space elevator|tether cities]].{{Ref/Anthology|Evo|Story=Palace Hotel|StoryLinkText=Palace Hotel}}


===Formation of the Home Fleet===
====Formation of the Home Fleet====
From [[2552#May|May 14–19, 2552]], UNSC forces in the [[Earth Defense Coordination Zone]] were placed at maximum readiness levels and all warships with [[MAC|magnetic accelerator cannon]]s self-deployed or towed to rally points. [[Cairo Station (station)|Cairo Station]] was established as flag headquarters. On [[2552#September 5|September 5, 2552]], all remaining [[UNSC Navy|naval]] forces were consolidated into a single command grouping: the [[UNSC Home Fleet]]. Fleet Admiral [[Joseph Harper]] was appointed senior flag officer and given primary administrative and tasking authority over all assets in the [[Sol system]] under emergency directives authorized by [[UNSC High Command]] and approved by the [[UEG Security Council]]. Remaining expeditionary and defense fleets retained administrative control over their [[battle group]]s, though all type commands were dissolved.<ref name="lootcrate2"/>
From [[2552#May|May 14–19, 2552]], UNSC forces in the [[Earth Defense Coordination Zone]] were placed at maximum readiness levels and all warships with [[MAC|magnetic accelerator cannon]]s self-deployed or towed to rally points. [[Cairo Station (station)|Cairo Station]] was established as flag headquarters. Following [[2552#September 5|September 5, 2552]], all remaining [[UNSC Navy|naval]] forces were consolidated into a single command grouping: the [[UNSC Home Fleet]]. Fleet Admiral [[Joseph Harper]] was appointed senior flag officer and given primary administrative and tasking authority over all assets in the [[Sol system]] under emergency directives authorized by [[UNSC High Command]] and approved by the [[UEG Security Council]]. Remaining expeditionary and defense fleets retained administrative control over their [[battle group]]s, though all type commands were dissolved.{{Ref/Reuse|lootcrate2}}


===Earth compromised===
===Earth compromised===
[[File:EarthLuminary.png|thumb|left|150px|Erde-Tyrene, as represented by the [[luminary]] discovered on Meridian.]]
[[File:EarthLuminary.png|thumb|left|150px|Erde-Tyrene, as represented by the [[luminary]] discovered on Meridian.]]
{{main|Operation: FIRST STRIKE}}
{{main|Operation: FIRST STRIKE}}
The [[Prophet of Truth]] discovered the location of [[Earth]] after the [[Fall of Reach]], but withheld knowledge of this discovery from the rest of the Covenant leadership.<ref name="waypoint">'''[[Halo Waypoint]]''', ''"Ten Twenty"''</ref> To attack the human homeworld, he ordered an [[Truth's fleet|assault fleet]] to secretly assemble at ''[[Unyielding Hierophant]]'' station in the [[Tau Ceti system]]. The fleet would overwhelm Earth's defenses in a single decisive strike.<ref name="waypoint"/><ref>'''[[Halo: First Strike]]''', ''page ??''</ref> The fleet was discovered by the UNSC [[Artificial intelligence|AI]] [[Cortana]] and preemptive strike was led by [[Vice Admiral]] [[Danforth Whitcomb]] and a [[SPARTAN-II Program|SPARTAN-II]], strike team, which successfully destroyed ''Unyielding Hierophant'' and almost the entirety of the assembled fleet, some five hundred ships.<ref name="waypoint"/><ref>''Halo: First Strike'', p. 333</ref> Earth was granted a small reprieve.
The [[Prophet of Truth]] discovered the location of [[Earth]] after the [[Fall of Reach]], but withheld knowledge of this discovery from the rest of the Covenant leadership.{{Ref/Film|Id=waypoint|Film=Halo Waypoint|Story=Ten Twenty|StoryLinkText=Ten Twenty}} To attack the human homeworld, he ordered an [[Truth's fleet|assault fleet]] to secretly assemble at ''[[Unyielding Hierophant]]'' station in the [[Tau Ceti system]]. The fleet would overwhelm Earth's defenses in a single decisive strike.{{Ref/Reuse|waypoint}}{{Ref/Novel|FS}} The fleet was discovered by the UNSC [[Artificial intelligence|AI]] [[Cortana]] and a preemptive strike was led by [[Vice Admiral]] [[Danforth Whitcomb]] and a [[SPARTAN-II Program|SPARTAN-II]], strike team, which successfully destroyed ''Unyielding Hierophant'' and almost the entirety of the assembled fleet, some five hundred ships.{{Ref/Reuse|waypoint}}{{Ref/Novel|Id=HFS333|FS|Page=333}} Earth was granted a small reprieve.


The [[Prophet of Regret]] also independently learned of the location of Earth as the location of a [[Forerunner]] artifact, [[Portal at Voi|the Portal]] leading to [[Installation 00|the Ark]]. This revelation came after long study by [[steward]]s of a Forerunner [[luminary]] taken from the moon, [[Meridian]], in [[2551]]. Not being privy to Truth's information, Regret set off to uncover the artifact without any knowledge  that Earth was the humans' homeworld. Regret unknowingly led his [[Fleet of Sacred Consecration|small fleet]], a mere two [[CAS-class assault carrier|assault carriers]] and thirteen [[CCS-class battlecruiser|battlecruisers]], straight into Earth's formidable defenses.<ref name="waypoint"/> Truth belatedly learned of Regret's expedition to Earth, and dispatched a large [[Jiralhanae]]-led fleet to reinforce the attack. They arrived mere hours after Regret had fled.<ref name="waypoint"/>
The [[Prophet of Regret]] also independently learned of the location of Earth that was known as Erde-Tyrene as the location of a [[Forerunner]] artifact, [[Portal at Voi|the Portal]] leading to [[Installation 00|the Ark]]. This revelation came after long study by [[steward]]s of a Forerunner [[luminary]] taken from the moon, [[Meridian]], in [[2551]]. Not being privy to Truth's information, Regret set off to uncover the artifact without any knowledge  that Erde-Tyrenne was the humans' homeworld. Regret unknowingly led his [[Fleet of Sacred Consecration|small fleet]], a mere two [[CAS-class assault carrier|assault carriers]] and thirteen [[Ket-pattern battlecruiser|battlecruisers]], straight into Earth's formidable defenses.{{Ref/Reuse|waypoint}} Truth belatedly learned of Regret's expedition to Earth, and dispatched a large [[Jiralhanae]]-led support and excavation fleet to reinforce the remaining forces of the initial fleet. They arrived almost one day after Regret had fled.{{Ref/Reuse|waypoint}}{{Ref/Reuse|waypointvergil}}<!--Halo Waypoint confirms that Truth's fleet arrived on October 21st-->
{{clear|left}}


==Battle==
==Battle==
===Regret's arrival===
===Arrival of Regret's fleet===
{{Quote|Something's not right. The fleet that destroyed Reach was fifty times this size!|[[Fleet Admiral]] [[Terrence Hood]]}}
{{Quote|Something's not right. The fleet that destroyed Reach was fifty times this size!|[[Fleet Admiral]] [[Terrence Hood]]{{Ref/Reuse|H2CS}}}}
The [[High Prophet of Regret]]'s [[Fleet of Sacred Consecration|fleet]] was detected near [[Jupiter]]'s moon [[Io]], as a series of [[Slipstream space|slipspace]] "whispers". [[Slipstream space probe|Probes]] were sent to investigate, but shortly afterwards the Covenant fleet exited slipspace near Earth, just outside the killzone of the planet's [[orbital defense platform]]s. UNSC forces went to [[Tactical Condition|TACCON]] Alpha 2. [[Fleet Admiral]] [[Harper]] ordered his battle group of the [[Fifth Fleet]] to attack, but quickly received new orders from Fleet Admiral [[Terrence Hood]] to fall back and defend the ODPs. Having expected an overwhelming enemy offensive in the style of the [[Fall of Reach|Battle of Reach]], the relative weakness of the attack puzzled the defenders.{{Ref/Level|Id=H2CS|H2|Cairo Station}}


[[File:H2A-pavel-belov-cairo-external.jpg|300px|thumb|left|The battle in space.]]
====Orbital Defense====
The [[High Prophet of Regret]]'s [[Fleet of Sacred Consecration|fleet]] was detected near [[Jupiter]]'s moon [[Io]], as a series of [[Slipstream space|slipspace]] "whispers".<ref name="H2CS">''[[Halo 2]]'', campaign level, [[Cairo Station]]</ref> [[Slipstream space probe|Probes]] were sent to investigate, but shortly afterwards the Covenant fleet exited slipspace near Earth, just outside the killzone of the planet's [[orbital defense platform]]s. UNSC forces went to [[Tactical Condition|TACCON]] Alpha 2. [[Fleet Admiral]] [[Harper]] ordered his battle group to attack, but quickly received new orders from Fleet Admiral [[Terrence Hood]] to fall back and defend the ODPs. Having expected an overwhelming enemy offensive in the style of the [[Fall of Reach|Battle of Reach]], the relative weakness of the attack puzzled the defenders.
{{Quote|no=two|Fleet Admiral Harper|Cortana|q1=First Echelon, you're with me, blanket those cruisers, take ‘em out one by one. Second Echelon, keep those carriers busy.|q2=Registering all hostile vessels inside the kill zone. Thirteen cruisers, two assault carriers. I'm going loud!|[[Fleet Admiral]] [[Joseph Harper|Harper]] and [[Cortana]] as the [[Space warfare|space battle]] between opposing fleets rages.{{Ref/Reuse|H2CS}}}}
[[File:H2A-pavel-belov-cairo-external.jpg|300px|thumb|left|The battle in space takes place despite Regret's fleet being outnumbered by the UNSC Home Fleet.]]
The assault carriers converged on the battle cluster including ''[[Athens Station]]'', ''[[Cairo Station (station)|Cairo Station]]'' and ''[[Malta Station]]''.{{Ref/Reuse|H2CS}} The ODPs opened fire as the enemy entered range. Covenant troops [[R'sisho-pattern Tick|boarded]] the stations, intending to demolish them with a {{Pattern|Chershi|antimatter charge|}} [[antimatter charge]] each. As each bomb was planted the Covenant withdrew. ''Athens'' and ''Malta'' were demolished in quick succession. [[Cortana]], aboard ''Cairo'', deduced the nature of the threat and [[John-117]] was dispatched to prevent the same fate from befalling ''Cairo''.{{Ref/Reuse|H2CS}}


The assault carriers converged on the battle cluster including ''[[Athens Station]]'', ''[[Cairo Station (station)|Cairo Station]]'' and ''[[Malta Station]]''.<ref name="H2CS"/> The ODPs opened fire as the enemy entered range. Covenant troops [[covenant boarding craft|boarded]] the stations, intending to demolish them with an [[antimatter charge]] each. As each bomb was planted the Covenant withdrew. ''Athens'' and ''Malta'' were demolished in quick succession. [[Cortana]], aboard ''Cairo'', deduced the nature of the threat and [[John-117]] was dispatched to prevent the same fate from befalling ''Cairo''.
Cortana directed the SPARTAN-II to the bomb's location in ''Cairo''{{'}}s fire control center. En route to the bomb, John-117 rescued Commander [[Miranda Keyes]] and allowed her to board {{UNSCShip|In Amber Clad}}. The frigate departed ''Cairo'' to join the fray.{{Ref/Reuse|H2CS}}


Cortana directed the SPARTAN-II to the bomb's location in ''Cairo''{{'}}s fire control center. En route to the bomb, John-117 rescued Commander [[Miranda Keyes]] and allowed her to board {{UNSCShip|In Amber Clad}}. The frigate departed ''Cairo'' to join the fray.
Meanwhile, Harper's Fifth Fleet continued to engage the Covenant task force in Earth orbit, sustaining huge losses in the wake of the Covenant's superior firepower but still prevailing through sheer numbers against the unusually small Covenant force. However, even as their escorts were effectively routed by the UNSC, the two assault carriers pushed onward, bypassing much of the already battered human fleet even as they too came under fire.{{Ref/Reuse|H2CS}}


Meanwhile, Harper's Fifth Fleet continued to engage the Covenant task force in Earth orbit, sustaining huge losses in the wake of the Covenant's superior firepower but still prevailing through sheer numbers against the unusually small Covenant force. However, even as their escorts were effectively routed by the UNSC, the two assault carriers pushed onward, bypassing much of the already battered human fleet even as they too came under fire.{{clear}}
The two assault carriers began to break through toward ''Cairo''. Cortana directed ''Cairo''{{'}}s MAC against the ''[[Solemn Penance]]'', but the ship did not stop to engage and instead made directly for [[New Mombasa]] on the surface. Admiral Harper led the attack on the [[Day of Jubilation|second carrier]] and depleted its shields. Keyes volunteered to attack the carrier immediately, but Hood was unwilling to pit a single frigate against so large a target.{{Ref/Reuse|H2CS}}


=====Covenant breakthrough=====
The solution to the second carrier came from an unexpected angle. John-117 and Cortana managed to defuse and capture the Covenant antimatter bomb aboard ''Cairo'', and the Spartan volunteered to go [[Extra-vehicular activity|EVA]] and personally plant the bomb on the last carrier. With Lord Hood's approval, John-117 leapt out of an airlock with the bomb using only the initial explosive decompression for impulse. [[GA-TL1 Longsword|Longsword]] interceptors opened a breach in the carrier's hull and allowed the Spartan to infiltrate and plant the bomb internally. The detonation destroyed the ship. John-117 escaped using the same means he had arrived and free fell to the UNSC ''In Amber Clad''.{{Ref/Reuse|H2CS}}
{{Quote|The carriers are breaking through sir, they're headed straight for the ''Cairo''!|Fleet Admiral Harper}}


[[File:H2A Cutscene Sniper&Spotter.png|300px|thumb|left|UNSC Marines preparing for the start of the invasion.]]
====Earthside====
The two assault carriers began to break through toward ''Cairo''. Cortana directed ''Cairo''{{'}}s MAC against the ''[[Solemn Penance]]'', but the ship did not stop to engage and instead made directly for [[New Mombasa]] on the surface.<ref name="H2CS"/> Admiral Harper led the attack on the [[Day of Jubilation|second carrier]] and depleted its shields. Keyes volunteered to attack the carrier immediately, but Hood was unwilling to pit a single frigate against so large a target.
{{Quote|Dear humanity, we '''regret''' being alien bastards, we '''regret''' coming to Earth, and we most definitely '''regret''' the Corps just blew up our raggedy-ass fleet!|Avery Johnson commenting on Regret's message.{{Ref/Reuse|H2Out}}}}
{{Main|Battle of Mombasa}}
[[File:H2A-daniil-kuksov-metropolis-scarab.png|300px|thumb|left|A Scarab attacks the city at the start of the invasion on New Mombasa.]]
Regret's carrier came to arrive over [[New Mombasa]] in the [[East African Protectorate]] via [[slipspace]] and deployed troops into the city and the surrounding area in an attempt to clear and secure it.{{Ref/Game|Id=sscirc1arc2|ODST|Detail=Sadie's Story, Circle 1, Arc 2}}{{Ref/Comic|Id=HGN|HGN|Detail=[[Second Sunrise Over New Mombasa]]}}{{Ref/Level|Id=H2Out|Game=Halo 2|Level=Outskirts}} While the [[Mombasa Tether]] had been shut down, the city's population were trying to leave the city.{{Ref/Game|Id=sscirc5arc2|ODST|Detail=Sadie's Story, Circle 5, Arc 2}}{{Ref/Reuse|Id=HGN}} While the UNSC, [[militia]]s and armed citizens was fighting against the Covenant forces, UNSC high command wished to discover why the Covenant were landing only in Mombasa, and [[John-117]] was ordered to capture Regret for interrogation. The Spartan deployed with marines and [[Orbital Drop Shock Trooper|ODST]] in a trio of [[D77-TC Pelican|Pelicans]] from the {{UNSCShip|In Amber Clad}} near the city. The dropships were shot down by a Covenant [[Protos-pattern Scarab|Scarab]] in [[Old Mombasa]].{{Ref/Reuse|H2Out}} John-117 and the survivors regrouped and pursued the walker to [[New Mombasa 105 East|NM 105E]], and across the bridge to New Mombasa [[New Mombasa Sector B|Sector B]]. At the time, the [[Alpha-Five]] was tasked to [[Operation: WINDOW PANE|recover]] the [[Conduit]] that was brought by the Covenant on the city while another ODST [[Unidentified ODST squad|squad]] were ordered to retrieve information the Covenant were interested in.{{Ref/Game|Id=ss|Game=Halo: Spartan Strike}} The Scarab was eventually trapped and destroyed by John-117 at the end of a canal. Covenant forces started to withdraw to the carrier for [[Slipstream space|slipspace]] departure to the [[Halo Array|Halo]] [[Installation 05]].{{Ref/Level|Id=H2Metro|H2|Metropolis}}


The solution to the second carrier came from an unexpected angle. John-117 and Cortana managed to defuse and capture the Covenant antimatter bomb aboard ''Cairo'', and the Spartan volunteered to go [[Extra-vehicular activity|EVA]] and personally plant the bomb on the last carrier. With Lord Hood's approval, John-117 leapt out of an airlock with the bomb using only the initial explosive decompression for impulse. [[GA-TL1 Longsword|Longsword]] interceptors opened a breach in the carrier's hull and allowed the Spartan to infiltrate and plant the bomb internally. The detonation destroyed the ship. John-117 escaped using the same means he had arrived and free fell to the UNSC ''In Amber Clad''.<ref name="H2CS"/>{{clear}}
In orbit the Home Fleet [[Operation: BUMRUSH|began deploying]] ODSTs to [[Mombasa]] in [[M8900 drop pod|SOEIVs]], intending to board the carrier and capture the Prophet of Regret. One Squad, [[Alpha-Nine]], deploying from the {{UNSCShip|Say My Name}} and led by Gunnery Sergeant [[Edward Buck]], was diverted by [[Office of Naval Intelligence|ONI]] to secure the city's [[Superintendent|infrastructure AI]].{{Ref/Level|Id=H3RDrop|ODST|Prepare To Drop}}


=====Regret flees=====
Regret's means of escape took the UNSC by surprise. The carrier initiated a slipspace jump while still over the city. By this time, Lord Hood originally attempted to intercept the Covenant carrier by dispatching two {{Class|Marathon|heavy cruiser}}s at New Mombasa.{{Ref/Reuse|H2Metro}} The UNSC ''In Amber Clad'' quickly recovered John-117 and the light frigate along with {{UNSCShip|Paris}}, {{UNSCShip|Redoutable}}, {{UNSCShip|Coral Sea}} were fast enough to follow the carrier into slipspace while {{UNSCShip|Dusk}} only followed in the fleeing ship's [[slipstream space#Slipspace wake|wake]].{{Ref/Novel|Id=goo186|HGoO|Page=186}} The slipspace rupture severely damaged the city{{Ref/Reuse|H2Metro}} and generated an [[Electromagnetic pulse|EMP]]. Many ODSTs had not yet landed when the carrier escaped and were caught in the EMP and blast. Drop pods were disabled in flight and plunged into uncontrolled freefall. Those who survived the blast were scattered across the city.{{Ref/Reuse|H3RDrop}}
{{Main|Battle of Mombasa}}
 
{{Quote|Dear humanity, we regret being alien bastards, we regret coming to Earth, and we most definitely regret the Corps just blew up our raggedy-ass fleet!|Avery Johnson commenting on Regret's message}}
Around this time, Covenant forces also attacked [[Cairo]], [[Egypt]]{{Ref/Reuse|encycearth}} and [[Berkeley]], [[URNA]]. At Berkeley, a [[Covenant starship]], possibly a ''Ket''-pattern battlecruiser from the Fleet of Sacred Consecration, began deploying its [[Seraph]] fighters on the city.{{Ref/Game|Id=axon12|Game=I love bees|Detail=[[Axon Clips]] - [[Axon Clips Chapter 12|Chapter 12]] - Kamal: "Fiancée"}}{{Ref/Note|This is derived from numerous pieces of information from within the Axon Clips including: Chapter 12 which mentions Kamal taking a flight back to the west coast; Chapter 9 where Sophia mentions that one of the people she is talking to isn't a Berkeley police officer and Kamal having to take a packbus to Reno, Nevada as his first stop; Chapter 10 where Kamal mentions waiting for said bus outside of Oakland.}}
 
{{clear|left}}
 
===Covenant reinforcements===
====Fall of Mombasa====
{{Quote|no=two|Veronica Dare|Edward Buck|q1=When did ''this'' happen?|q2=They started showing up right before I went underground.|[[Captain]] [[Veronica Dare]] and [[Gunnery Sergeant]] [[Edward Buck]] viewing a second and larger [[Truth's fleet|fleet]] of Covenant starships circling Mombasa.{{Ref/Reuse|H3RCoast}}}}
[[File:Portal odst.png|thumb|250px|After fully securing the East Africa, the Jiralhanae excavation fleet begin to uncover the Portal at [[New Mombasa]].]]
Immediately following the slipspace event, [[Jiralhanae]] forces loyal to the [[High Prophet of Truth]], who had embedded said troops into his political rival Regret's fleet,{{Ref/Novel|Id=hnbc8|[[Halo: New Blood]]|Chapter=8}} enacted their leader's orders. The Jiralhanae violently displaced their Sangheili commanders left in the initial fleet both ground-side,{{Ref/Level|Id=H3RTayari|ODST|Tayari Plaza}} and in orbit, and then seized the full control of Covenant forces at Mombasa in order to secure Truth's arrival on the Portal by his loyalists,{{Ref/Reuse|Id=bungie}} the beginning of Truth's plan to place the Jiralhanae as the Covenant's primary warrior race.{{Ref/Reuse|waypoint}} While ''[[High Charity]]'' and the rest of its [[High Charity defense fleet|fleet]] were following the ''Solemn Penance'' on their way to the newly discovered Halo Installation 05, the murder of Regret's Sangheili forces remained secret from the rest of the Covenant.


[[File:The Drop.png|thumb|right|250px|The {{UNSCShip|Chioglossa}} destroyed during the opening stages of the battle passed by ODSTs being deployed into New Mombasa.]]
Surviving UNSC forces in the city, aided by the [[New Mombasa Police Department]], continued to resist, but were eventually overwhelmed. The next day on October 21, a [[Truth's fleet|Jiralhanae-led support fleet]] sent by Truth arrived at the African continent, joining the remains of Regret's fleet as the combined fleet began glassing [[Mombasa]] and the surrounding area together, uncovering [[the Portal]] to the [[Installation 00|Ark]].{{Ref/Site|Id=waypointvergil|URL=https://www.halowaypoint.com/en-us/news/canon-fodder-vergil-reality|Site=Halo Waypoint|Page=Canon Fodder - Vergil Reality|D=15|M=06|Y=2021}}{{Ref/Reuse|waypoint}}<!--Halo Waypoint confirms that Truth's fleet arrived on October 21st--> Captain Dare and her [[Alpha-Nine|ODST squad]] managed to secure the city's [[Superintendent|infrastructure AI]] and escape before the city fell to the enemy.{{Ref/Level|Id=H3RCoast|ODST|Coastal Highway}} These forces of the new fleet was both archaeological and military.<ref>halo3.com - About Halo, Characters, Humans ([https://archives.halopedia.org/halo3/ Archive])</ref> While a handful of ships of the second fleet engaged Earth's forces, the majority of the fleet was preoccupied for the excavation of the massive slipspace portal.{{Ref/Reuse|mythos}}
Regret's carrier came to stop over [[New Mombasa]] in the [[East African Protectorate]] and deployed troops into the city and the surrounding area.<ref name="H2Out">''Halo 2'', campaign level, [[Outskirts]]</ref> UNSC high command wished to discover why the Covenant were landing only in Mombasa, and [[John-117]] was ordered to capture Regret for interrogation. The Spartan deployed with marines and [[Orbital Drop Shock Trooper|ODST]] in a trio of [[D77-TC Pelican|Pelicans]] from the {{UNSCShip|In Amber Clad}} near the city. The dropships were shot down by a Covenant [[Type-47A Scarab|Scarab]] in [[Old Mombasa]]. John-117 and the survivors regrouped and pursued the walker to [[New Mombasa 105 East|NM 105E]], and across the bridge to New Mombasa [[New Mombasa Sector B|Sector B]]. The Scarab was eventually trapped and destroyed at the end of a canal. Covenant forces started to withdraw to the carrier for [[Slipstream space|slipspace]] departure.<ref name="H2Metro">''Halo 2'', campaign level, [[Metropolis]]</ref>


In orbit the Home Fleet [[Operation: BUMRUSH|began deploying]] ODSTs to [[Mombasa]] in [[Single Occupant Exoatmospheric Insertion Vehicle|SOEIVs]], intending to board the the carrier and capture the Prophet of Regret. One Squad, [[Alpha-Nine]], deploying from the {{UNSCShip|Say My Name}} and led by Gunnery Sergeant [[Edward Buck]], was diverted by [[Office of Naval Intelligence|ONI]] to secure the city's [[Superintendent|infrastructure AI]].<ref name="H3RDrop">''[[Halo 3: ODST]]'', campaign level, [[Prepare To Drop]]</ref>
====Covenant occupation====
{{Quote|So then the [[Covenant fleet]] really starts to tear into the orbital defenses. It's getting ugly up there. Major skirmishes with the [[Second Fleet|Second]], [[Seventh Fleet|Seventh]], and [[Sixteenth Fleet]]s.|[[Laura Tanner|Sergeant Laura "Smokes" Tanner]]{{Ref/Reuse|goo204}}}}
[[File:HLC battle for earth.png|thumb|left|250px|UNSC and Covenant forces fight each other for supremacy of Earth.]]
The battle spread all over the globe in the following days and weeks with more and more [[Covenant fleet]]s of multitude of [[warship]]s continuing to arrive and attacked targeting cities and areas globally after the full compromise of Earth,{{Ref/Reuse|HUI3}}{{Ref/Reuse|goo204}}{{Ref/Reuse|lootcrate2}} led by Jiralhanae and Sangheili commanders.{{Ref/Reuse|HUI1}}{{Ref/Game|Id=thav|Halo Infinite|What=Targets: Thav 'Sebarim}} At the same time as these events, other colonies and parts of the [[Sol system]] such as [[Battle of Luna|Luna]] and [[Battle of Mars|Mars]] came under assault by the Covenant.{{Ref/Reuse|lootcrate2}}


Regret's means of escape took the UNSC by surprise. The carrier initiated a slipspace jump while still over the city. The UNSC ''In Amber Clad'' quickly recovered John-117 and followed in the fleeing ship's [[slipstream space#Slipspace Wake|wake]]. The slipspace rupture severely damaged the city<ref name="H2Metro"/> and generated an [[Electromagnetic pulse|EMP]]. Many ODSTs had not yet landed when the carrier escaped and were caught in the EMP and blast. Drop pods were disabled in flight and plunged into uncontrolled freefall. Those who survived the blast were scattered across the city.<ref name="H3RDrop"/>
While maintaining a significant presence in orbit, the Covenant ships deployed ground forces to multiple targets around the globe.{{Ref/Reuse|goo204}} However, due to many Covenant forces, notably those under the command of the [[Prophet of Truth]] and his Jiralhanae loyalists, that were concentrating their forces at Kenya for the excavation of the Portal at Voi, some of their forces were sometimes disorganized, hence less effectual.{{Ref/Reuse|lootcrate2}} A [[Second Battle of New Mombasa]] between the UNSC and Jiralhanae-led Covenant ground forces takes place shortly after the [[Battle of Mombasa|first battle]] over seven days<ref name="JC">''Xbox.com'': Jake Courage (defunct, [https://archives.halopedia.org/halo3/jakecourage/ Archived])</ref> before the end of October.{{Ref/Film|Film=Believe|Story=Museum}} The [[SPARTAN-II program|Spartan]] [[Blue Team]], consisting of [[Frederic-104]], [[Linda-058]], and [[William-043]], were constantly engaged for the first two weeks. They repelled enemy ships in orbit in numerous zero-gee operations whilst on the surface they neutralized Covenant excavations, first on [[Ross Island]] in [[Antarctica]],{{Ref/Reuse|goo204}} and then underwater off the [[Yucatan Peninsula]].  


===Truth's fleet arrives===
[[File:HINF London Skyline.png|thumb|250px|London, one of many major cities to fall under Covenant occupation.]]
{{Quote|The Covenant have found Earth. They ''own'' New Mombasa. Anyone that could've driven them off is dead, or gone. I'd say that makes for desperate times.|Edward Buck}}
[[Sydney]], [[Australia]] was one of the cities invaded by the Covenant during the engagement due to its importance in UNSC's war effort. Though the city suffered heavy damage by Covenant bombardment, the UNSC's [[HIGHCOM Facility Bravo-6]] remained undamaged.{{Ref/Novel|Id=glasslandsp.26|Gla|Page=26-33}} [[Diego Garcia]], following its effective attacks against the initial Covenant forces during the [[Battle of Mombasa]], was attacked by a Covenant [[capital ship]] to destroy the base around November, but the base managed to survive the attack.{{Ref/Book|Id=encycearth|Book=Halo Encyclopedia: The Definitive Guide to the Halo Universe|Detail=Earth, p. 284-285, (2009); p. 296-297 (2011 edition)}}{{Ref/Novel|MorDi|Page=265}} [[Aranuka]], a vast city-platform built, was aggressively invaded by the Covenant, killing thousands of Aranukan inslanders, and much of the city was destroyed in their research for a supposed hidden Forerunner artifact. Despite heavy casualties, the UNSC was able to drift the alien invaders away and the [[Aranuka Space Tether]] survived the siege of the city.{{Ref/Reuse|Id=loochapt2}}


[[File:Portal odst.png|thumb|right|250px|The Covenant occupation fleet uncovering the Portal at [[New Mombasa]].]]
Elsewhere, Jiralhanae forces landed in [[London]], [[Britain]] and soon established an occupation of the city. UNSC forces were deployed into the city to evacuate civilians, including future [[SPARTAN-IV program|SPARTAN-IV]] commander [[Laurette Agryna]].{{Ref/Generic|[[Halo Infinite Multiplayer Season 1 Cinematic Intro]]}}{{Ref/Site|URL=https://axisstudiosgroup.com/work/halo-infinite/|Site=Axis Studios|Page=Halo Infinite|Quote=Focusing on the recollections of Spartan Commander Laurette Agryna, the trailer delves into her own heroic journey as a young girl caught in the crosshairs of a battle in the centre of London 2552 AD, her rescue by Spartans and her inspiration to become a Spartan herself.|D=31|M=8|Y=2021}}
Immediately following the slipspace event, [[Jiralhanae]] forces loyal to the [[High Prophet of Truth]], who had embedded said troops into his political Rival Regret's fleet,<ref>'''[[Halo: New Blood]]''', ''Eight''</ref> enacted their leader's orders. The Jiralhanae violently displaced their Sangheili commanders both ground-side,<ref name="H3RTayari">''Halo 3: ODST'', campaign level, [[Tayari Plaza]]</ref> and in orbit, the beginning of Truth's plan to place the Jiralhanae as the Covenant's primary warrior race.<ref name="waypoint"/> Additional Jiralhanae led-Covenant ships sent by Truth also began to arrive in the Sol System, joining the remains of Regret's fleet in the assault upon Earth.


Surviving UNSC forces in the city, aided by the [[New Mombasa Police Department]], continued to resist, but were eventually overwhelmed. The Covenant began glassing [[Mombasa]] and the surrounding area, uncovering [[the Portal]] to the [[Installation 00|Ark]]. Captain Dare and her [[Alpha-Nine|ODST squad]] managed to secure the city's [[Superintendent|infrastructure AI]] and escape before the city fell to the enemy.<ref name="H3RCoast">''Halo 3: ODST'', campaign level, [[Coastal Highway]]</ref>
On [[2552#November|November 3]], the [[Great Schism]] finally erupted among the Covenant with all [[Covenant separatists|now-casted out]] Sangheili and Covenant forces, now led by the Jiralhanae as the new dominant military backbone of the hegemony, turning and fighting each other which resulted many Sangheili being allied with the UNSC following the death of the [[Chieftain of the Jiralhanae]] [[Tartarus]] during the [[Battle of Installation 05]].{{Ref/Reuse|H2GJ}} During that time, the Spartan Blue Team were [[Battle of Havana|deployed]] to [[Havana]], [[Cuba]], where they stole the enemy Jiralhanae [[Sinaris-pattern heavy destroyer|destroyer]] ''[[Bloodied Spirit]]'', and destroyed another destroyer and the [[Centennial Orbital Elevator]]. They subsequently redeployed aboard the stolen ship to the Forerunner [[shield world]] [[Onyx]] to aid [[Catherine Halsey|Dr. Catherine Halsey]], the creator of the SPARTAN-II program.{{Ref/Novel|Id=goop.220|Halo: Ghosts of Onyx|Page=220}} During the same day, 3 UNSC [[expeditionary fleet]]s of the [[UNSC Home Fleet|Home Fleet]]: the [[Second Fleet|Second]], [[Seventh Fleet|Seventh]], and [[Sixteenth Fleet]]s were contesting Earth orbit against numerous Covenant vessels during major orbital skirmishes as the fighting in orbit is scattering the orbital defense,{{Ref/Novel|Id=goo204|HGoO|Page=204-205}} but the Covenant continued to raid the surface in search of [[Forerunner]] artifacts, with many under the [[Prophet of Truth]]'s command mostly concentrating in East Africa.{{Ref/Book|Id=mythos|HM|Page=117}}


=====Covenant occupation=====
On [[2552#November|November 10]], Covenant forces began to excavate and occupy built-up positions centered around [[Free-fire Area OZONE]] in [[Arizona]], [[URNA]].{{Ref/Generic|Id=lootcrate2|Heading=[[Halo Legendary Crate]]|Subheading=[[Halo Legendary Crate/Data Drops|Data Drop #2]]}} As of mid-November, the majority of cities were destroyed over the course of the Battle for Earth,{{Ref/Reuse|HUI3}} and the population of Earth was already reduced to 5 billion earlier this month.{{Ref/Reuse|Id=ENC}}
The battle spread over the globe in the following weeks. The diminishing [[UNSC Home Fleet]], in conjunction with the [[Second Fleet|Second]], [[Seventh Fleet|Seventh]], and [[Sixteenth Fleet]]s,<ref name="goo204">''Halo: Ghosts of Onyx'', p. 204-205</ref> remained to contest Earth orbit, but the Covenant continued to raid the surface in search of [[Forerunner]] artifacts, mostly concentrating in east Africa.<ref name="H3CN">''[[Halo 3]]'', campaign level, [[Crow's Nest]]</ref>


[[File:HLC battle for earth.png|thumb|left|250px|UNSC forces engage the Covenant.]]
===Truth arrives===
The [[SPARTAN-II program|Spartan]] [[Blue Team]], consisting of [[Frederic-104]], [[Linda-058]], and [[William-043]], were constantly engaged for the first two weeks. They repelled enemy ships in orbit in numerous zero-gee operations whilst on the surface they neutralized Covenant excavations, first on [[Ross Island]] in [[Wikipedia:Antarctica|Antarctica]],<ref name="goo204"/> and then underwater off the [[Yucatan Peninsula]]. On [[2552#November|November 3]], they were [[Battle of Havana|deployed to Havana, Cuba]], where they stole the enemy [[Covenant destroyer|destroyer]] ''[[Bloodied Spirit]]'', and destroyed another destroyer and the [[Centennial Orbital Elevator]]. They subsequently redeployed aboard the stolen ship to the Forerunner [[shield world]] [[Onyx]] to aid [[Catherine Halsey|Dr. Catherine Halsey]], the creator of the SPARTAN-II program.<ref name="goop.220">''Halo: Ghosts of Onyx'', p. 220</ref>
{{Quote|no=two|1=Fleet Admiral Terrence Hood|q1=Master Chief, you mind telling me what you're doing on [[Anodyne Spirit|that ship]]?|2=Master Chief|q2=Sir, finishing [[Human-Covenant War|this fight]].|3=Admiral Terrence Hood and John-117, as the Keyship arrived at Earth.}}
[[File:HU-John-06.jpg|thumb|250px|John-117 attempting to assassinate the Prophet of Truth before the Prophet's death being foiled by a [[Kig-Yar Sniper]].]]
Near the conclusion of the [[Battle of Installation 05]], the [[Prophet of Truth]] departed ''[[High Charity]]'', near Halo [[Installation 05]], in the [[Forerunner]] [[keyship]] ''[[Anodyne Spirit]]'' on November 3, arriving at the [[Sol system]] on the November 8 and proceeding on course towards Earth at near-relativistic speeds.{{Ref/Reuse|Id=bungie}} The prophet sought to activate the Ark, fire the [[Halo Array]], and begin what he thought would be the "[[Great Journey]]". After the [[Fall of High Charity|loss]] of [[High Charity]] to the [[Flood]], the Covenant reorganized to make a final push offensive on Earth,{{Ref/Reuse|H2GJ}} as the Prophet of Truth took many remaining Covenant fleets at his disposal following his departure.{{Ref/Reuse|Id=hbc286}} However, upon his arrival, the Prophet quickly learned that John-117 had stowed away aboard the ship and its crew then became [[Scramble onboard Forerunner Dreadnought|preoccupied]] with finding and eliminating the Spartan.{{Ref/Reuse|LongRoad}}


On [[2552#November|November 10]], Covenant forces began to excavate and occupy built-up positions centered around [[Free-fire Area OZONE]] in [[Arizona]], [[URNA]].<ref name="lootcrate2">''[[Halo Legendary Crate]]'', [[Halo Legendary Crate/Data Drops|Data Drop #2]]</ref>
By this time, the Prophet of Truth led the largest Covenant invasion force recorded by the UNSC at that point in the war to Earth: a very massive Covenant combined armada, presumably both larger than the [[Fleet of Particular Justice|one]] used during the Fall of Reach and containing at least over three hundreds ships – including the remaining loyalist starships and fleets of the [[High Charity defense fleet]] – as the final contingent of his forces.{{Ref/Reuse|truthsfleet}}{{Ref/Site|Id=dreadnought|URL=https://www.halowaypoint.com/en-us/universe/vehicles/dreadnought|Site=Halo Waypoint|Page=Dreadnought|D=25|M=07|Y=2021}}{{Ref/Site|Id=dreadnought|URL=https://www.halowaypoint.com/en-us/universe/vehicles/dreadnought|Site=Halo Waypoint|Page=Dreadnought|D=25|M=07|Y=2021}}{{Ref/Novel|Id=hbc286|BC|Page=286 (Google Books)|Quote=He has taken what is left of the Covenant fleets and is heading for the human world, Earth. He is seeking the Ark.|Quotee=[[G'torik 'Klemmee]]}} The fleet would later breach the Lunar perimeter,{{Ref/Reuse|H3CN}} and then engage the [[UNSC Home Fleet]], which was already weakened by the previous invasion fleets over Earth, at some point prior to the Forerunner Dreadnought's arrival on Earth as the November 17 dawned.{{Ref/Level|Id=H2GJ|H2|[[The Great Journey (level)|The Great Journey]]}}


[[File:Cleveland in 2552.PNG|thumb|right|250px|Covenant forces invade Cleveland.]]
Whilst on [[Installation 05]], [[Commander]] [[Miranda Keyes]], [[Sergeant Major]] [[Avery Johnson]], and [[Arbiter]] [[Thel 'Vadam]] learned of the Prophet of Truth's intentions and departed the installation after the ''Anodyne Spirit'' while [[Rtas 'Vadum]] and most of [[Fleet of Retribution|Sangheili vessels]] under his command, comprising hundreds of ships, stayed behind on Installation 05 in order to quarantine and glass the Halo ring as well as quarantine High Charity in order to stop the escape of the [[Flood]] and the Gravemind from both the Halo and the city. Upon arrival at Earth on or just before November 15 aboard one of the Sangheili vessels,{{Ref/Reuse|lootcrate2}}{{Ref/Marketing|Id=LongRoad|Halo Waypoint|The Long Road Home}} they took up station in an old military base, [[Crow's Nest]], near Voi, and waited for John-117 to arrive.{{Ref/Reuse|H3CN}}{{Ref/Note|The Sangheili vessel carrying the Arbiter and the survivors of ''In Amber Clad'' arrived at Earth at least two days before Truth's Keyship, despite the latter leaving Delta Halo's orbit well ahead of the former. While this may appear strange given that Forerunner slipspace travel can vastly outpace that of the Covenant, the apparent discrepancy is explained by the Keyship exiting slipspace in the outer edges of the Sol system on November 8 and not landing on Earth until November 17. The reason behind this delay was that the Covenant soldiers inside the Keyship focused on killing John instead of proceeding, as they feared he would kill the Prophet of Truth.}} On November 15, Sergeant Major Johnson and the [[Office of Naval Intelligence|ONI]] interrogated [[Quick to Adjust]], a rebel [[Huragok]] since the Regret's attack on New Mombasa, to share information he had and relating to the [[Portal at Voi]].{{Ref/Reuse|lootcrate2}}{{Ref/Reuse|H3RCoast}}
The UNSC's loss of their garrison on [[Mars]] following the [[Battle of Mare Erythraeum]] led to a dramatic increase in Covenant force deployments on Earth.<ref>''Halo: Uprising'', [[Halo: Uprising Issue 3|Issue 3]]</ref> Shortly after the loss of Mars, Covenant also [[Battle of Cleveland|invaded the city]] of [[Cleveland]] on Earth, looking for an artifact known as the "[[Key of Osanalan]]". The Key turned out to be a hoax perpetrated by Colonel [[James Ackerson]]; this attack was ultimately repelled due to the Colonel's act of self-sacrifice, and that of his civilian brother, [[Ruwan Ackerson|Ruwan]].<ref>''Halo: Uprising'', [[Halo: Uprising Issue 4|Issue 4]]</ref>


[[Sydney]], [[Australia]] was one of the cities invaded by the Covenant during the engagement. Though the city suffered heavy damage by Covenant bombardment, the UNSC's [[HIGHCOM Facility Bravo-6]] remained undamaged.<ref name="glasslandsp.26">''Halo: Glasslands'', p. 26-33</ref>
====Turning the tide====
{{Main|Scramble onboard Forerunner Dreadnought|Battle of Cleveland}}
{{Quote|no=two|Colonel James Ackerson|Shipmaster Lepidus|q1=See, that's why you're going to lose. All your pomp and thinking you're right about everything... when it comes down to it you're just dumb and arrogant and--|q2='''That's''' why we'll win.|[[Colonel]] [[James Ackerson]]'s last words before his demise at the hands of [[Lepidus]], and Lepidus after executing James.{{Ref/Reuse|HUI4}}}}
[[File:H2A - Earth and Dreadnought.jpg|left|300px|thumb|The Forerunner Dreadnought ferrying Truth jumps into Earth high orbit, where the final space battle continues to rage between opposing fleets over the planet.]]


Near the conclusion of the [[Battle of Installation 05]], the [[Prophet of Truth]] departed ''[[High Charity]]'', near Halo [[Installation 05]], in the [[Forerunner Dreadnought]] on November 3, arriving at the Sol system on the 8th.<ref>''[[Halo: Uprising]]'', "Issue ??"</ref> The prophet sought to activate the Ark, fire the [[Halo Array]], and begin what he thought would be the "[[Covenant religion|Great Journey]]". Unbeknownst to the Covenant, John-117 had stowed away aboard the ship.<ref name="H3CN"/>
At some point between November 15 and 16,{{Ref/Note|''Halo: Uprising'' indicates that John-117 and Ruwan's actions was both concurrent. While ''Halo 2: Anniversary'' and ''Halo 3'' show that Kenya, which was aimed by the Forerunner Dreadnought, was still in night at the time that the ship jumped into Earth and then landed on the Portal at Voi in November 17 in the morning on the [[Africa|African continent]], the Battle of Cleveland in ''Halo: Uprising'' seemingly took place on the very early morning, if not evening, on the [[North America|North American continent]] and still ongoing even after the sunrise on the Cleveland city, which would be likely and realistic that the battle took place at least one day before November 17, although the URNA is oddly still in daylight in the comic when the Forerunner Dreadnought arrived at Earth.}} while John-117 was still hunting the Prophet of Truth, the UNSC already lost their garrison on [[Mars]] at the hands of the [[Fleet of Furious Redemption]] following the [[Battle of Mare Erythraeum]],{{Ref/Reuse|HUI1}} which led to a dramatic increase in Covenant force deployments on Earth as the Covenant began to concentrate more of their forces on the planet, worsening the siege.{{Ref/Comic|Id=HUI3|HU|Issue=3}} Despite the dramatic increase in Covenant deployments, the works of [[Colonel]] [[James Ackerson]] in the Battle of Mare Erythraeum helped buy UNSC ground forces on Earth precious time.{{Ref/Book|Id=ackerson|Book=[[Halo Encyclopedia (2009 edition)]]|Page=??}} By this point, the UNSC would be hardly faced with impossible odds with no hope in sight against the full might of Covenant forces on Earth.{{Ref/Reuse|Id=HUI4}}


Whilst on [[Installation 05]], [[Commander]] [[Miranda Keyes]], [[Sergeant Major]] [[Avery Johnson]], and [[Arbiter]] [[Thel 'Vadam]] learned of the Prophet of Truth's intentions and departed the installation after the Dreadnought while [[Rtas 'Vadum]] and the Sangheili under his command stayed behind on Installation 05 in order to quarantine and glass the Halo ring as well as quarantine High Charity in order to stop the escape of [[the Flood]] and the Gravemind from both the Halo and the city. Upon arrival at Earth on or just before November 15,<ref name="lootcrate2"/> they took up station in an old military base, [[Crow's Nest]], near Voi, and waited for John-117 to arrive.<ref name="H3CN"/><ref group="note">The Sangheili vessel carrying the Arbiter and the survivors of ''In Amber Clad'' arrived at Earth at least two days before Truth's Keyship, despite the latter leaving Delta Halo's orbit well ahead of the former. While this may appear strange given that Forerunner slipspace travel can vastly outpace that of the Covenant, the apparent discrepancy is explained by the Keyship exiting slipspace in the outer edges of the Sol system on November 8 and not landing on Earth until November 17. The reason behind this delay was that the Covenant soldiers inside the Keyship focused on killing John instead of proceeding, as they feared he would kill the Prophet of Truth.</ref>
Shortly after the loss of Mars, Covenant forces also [[Battle of Cleveland|invaded the city]] of [[Cleveland]] on Earth without intending to destroy it or kill civilians, unlike other cities, looking for a supposed Forerunner artifact known as the "[[Key of Osanalan]]" as told by a wounded and Covenant-tortured Colonel [[James Ackerson]], who was captured aboard [[Lepidus]]'s vessel, the ''[[Triumphant Declaration]]'', and that was a necessary component for the firing sequence of the [[Halo Array]]. Additionally, his plan would help the population to escape the city and stall the Covenant assault on Earth and prevent the planet's [[Glassing|fall]] to the Covenant like [[Reach]].{{Ref/Comic|Id=HUI1|HU|Issue=1}} During the battle, many civilians were [[Prisoner of war|captured]] and interrogated at [[Jacobs Field]] in [[Old Cleveland]] for the Key of Osanalan,{{Ref/Reuse|HUI1}} but later evacuated following a surprise attack from a [[Orbital Drop Shock Troopers|ODST]] team that suddenly killed most of the Covenant forces.{{Ref/Comic|Id=HUI2|Comic=Halo: Uprising|Issue=[[Halo: Uprising Issue 2|2]]}}


=====Truth's arrival=====
Arriving in a large chamber aboard the keyship ''Anodyne Spirit'' with the Prophet of Truth and a pack of Jiralhanae soldiers and [[Jiralhanae Honor Guardsman|honor guardmens]] being present, John-117 attempted to kill the Prophet remotely via a {{Pattern|Vostu|carbine}}, as soon as the Spartan was then attacked by a [[Kig-Yar Sniper]] and the Prophet escaped, forcing John-117 to confront and engage a number of Jiralhanae warriors. While the Spartan was believed to be [[Missing in action|dead]], the Prophet of Truth orders the crew of the Forerunner Dreadnought to jump further in-system and finally arrived at Earth in high orbit on November 17, spearheading the final contingent of Truth's forces as the final space battle is still raging and the ship was then surrounded by the massive space engagement.{{Ref/Reuse|H2GJ}}{{Ref/Reuse|HUI4}}  During which, John-117, emerged once again, broadcast to the UNSC, confirming his presence and his information regarding his situation.{{Ref/Reuse|HUI4}}
{{Quote|no=two|1=Fleet Admiral Terrence Hood|q1=Master Chief, you mind telling me what you're doing on that ship?|2=Master Chief|q2=Sir, finishing this fight.|3=Admiral Terrence Hood and John-117, as the Keyship arrived at Earth.}}
[[File:H3 Sierra 117 Reynolds captured.jpg|300px|thumb|right|The Covenant occupying an African jungle]]


The Forerunner Dreadnought arrived at Earth on November 17, spearheading the final contingent of Truth's forces. The Covenant fleet breached the Lunar perimeter, devastating the remnants of the [[UNSC Home Fleet]]. The subsequent bombardment caused "extreme" casualties.<ref name="H3CN"/> As the Dreadnought entered Earth's atmosphere, John-117 left the ship by leaping off during re-entry and crashing into the [[East African Protectorate|East-African]] jungle.<ref>'''Halo: Uprising''', "Issue ??"</ref><ref name="H3S117">''Halo 3'', campaign level, [[Sierra 117]]</ref> By this time the Covenant had set up heavy [[Type-27 Mantis|AA batteries]] and other defenses near [[Voi]] and in the surrounding area to protect their work at the Portal.<ref name="H3CN"/>
At the outcome of space engagements, almost the entire [[UNSC Home Fleet]], hence many entire smaller fleets, had been utterly overrun by the outnumbering and outgunning Covenant naval forces, though it was likely that most of the overwhelming Covenant fleet, mostly the capital ships, was in return destroyed by the UNSC defenders, mainly due to Earth's formidable and fierce defense and Hood's brilliant leadership, especially thanks to multiple defending [[Magnetic Accelerator Cannon#Mark V|"Super" MAC]]-equipped [[orbital defense platform]]s,{{Ref/Reuse|H2TA}} throughout the Battle for Earth.{{Ref/Level|Id=H3CN|H3|Crow's Nest}} After demolishing most of Earth defenses, the recently-victorious Covenant fleet then lead a colossal [[orbital bombardment|bombardment]] on Earth, causing extreme terrestrial casualties and damaging much of the surface of the planet.{{Ref/Reuse|H3CN}} The ''[[Cairo Station (station)|Cairo Station]]'' survived the final space battle relatively intact, albeit left damaged.{{Ref/Reuse|H2GJ}}


During Spartan-117's re-entry, a pair of ODSTs used a [[laser designator]] during the [[Battle of Sector Six]] in Afghanistan to track the Spartan's fall.<ref>[[Halo: Landfall]]</ref> The data made it easier for Sergeant Johnson and Thel 'Vadam to locate the Spartan. After [[Recovery of John-117|making their way through the jungle]], they were extracted by a [[D77H-TCI Pelican|dropship]], despite Covenant resistance, and taken to [[Crow's Nest (location)|Crow's Nest]].<ref name="H3S117"/> The Covenant tracked them back to the base, however, and [[Attack on Crow's Nest|launched an attack]].<ref name="H3CN"/>
[[File:S117returnstoEarth2552.jpg|300px|thumb|John-117 and the Dreadnought entering Earth's atmosphere before crashing on East Africa.]]
James' civilian brother, [[Ruwan Ackerson]] who was aware of what the Covenant are looking for during the Covenant interrogation at Cleveland, along with [[Myras Tyla]], were both brought to a secret UNSC forces to meet [[Sergeant]] [[Twyker]] in attempt to repel the Covenant forces in Cleveland.{{Ref/Reuse|HUI1}}{{Ref/Reuse|HUI2}} Ruwan was injected with [[Tykos 30]], an organic tracking device, as Tyla and the remaining civilians were evacuated. He was then taken to [[Chagrin Falls]], where a [[Jiralhanae Chieftain]] demanded that Ackerson relinquish the Key of Osanalan and an army of Jiralhanae surrounded him. However, Ruwan told them ''he'' was the Key, which confused the Covenant and brought him aboard an orbiting {{Pattern|Ket|battlecruiser}}, the ''[[Harbinger of Piety]]'', before the [[Minister of Inquisition]]. There, the Minister vows to spare Earth from the Covenant occupation in exchange for knowledge of the apparent "key". Aboard the Forerunner Dreadnought, John-117, unable to assassinate the Prophet of Truth and take control of the Forerunner Dreadnought's trajectory, was informed that the ''Harbinger of Piety'' that was holding the "key" is to be destroyed. Since the ship was near the keyship, the Spartan was ordered by Twyker to find a way off the Forerunner Dreadnought to avoid being caught in the impending destruction of the cruiser. The Master Chief was then ordered to find a way to return to Earth quickly as the Forerunner Dreadnought began to enter Earth's atmosphere.{{Ref/Reuse|HUI4}} While the Minister was still interrogating Ruwan, the ''[[Nassau Station]]'' proceeded to remotely shoot at the ''Harbinger of Piety'' with a single shot from its [[Magnetic Accelerator Cannon|MAC]] gun, destroying instantly the cruiser and killing everyone aboard, including the Minister of Inquisition and Ruwan Ackerson. Though, Twyker's worries was proven ill-founded due to Forerunner Dreadnought remaining unharmed following the ''Harbinger of Piety''{{'}}s destruction.{{Ref/Reuse|HUI4}}


=====UNSC counterattack=====
After that a furious Lepidus was aware of the loss of ''Harbinger of Piety'' and the Key of Osalanan was in fact turned out to be a hoax perpetrated by Colonel [[James Ackerson]] while openly mocking the Covenant for their arrogance, the Jiralhanae [[shipmaster]] decapitated the colonel aboard the ''[[Triumphant Declaration]]'' over Mars. Ultimately, the attack on Cleveland was repelled due to James's act of self-sacrifice, and that of Ruwan.{{Ref/Comic|Id=HUI4|Comic=Halo: Uprising|Issue=[[Halo: Uprising Issue 4|4]]}}  Though the Martian valiant defense forces were crushed during the [[Battle of Mare Erythraeum|Battle of Mars]], they are credited for delaying Covenant forces from pressing their siege on Earth.{{Ref/Site|Id=mars|URL=https://www.halowaypoint.com/en-us/universe/locations/mars|Site=Halo Waypoint|Page=Mars|Y=2021|D=14|M=06}} Shortly after the Covenant worldwide bombardment, the Earth human population was swiftly reduced to only 200 million individuals, initially around 10 billion prior the Covenant assault with heavy casualties and a major evacuation effort and the sudden change after Truth's arrival.{{Ref/Game|Id=bestiarum|Game=Halo 3|What=[[Bestiarum]]}}{{Ref/Book|Id=ENC|Book=Halo Encyclopedia: The Definitive Guide to the Halo Universe|Page=282}}{{Ref/Site|Id=populateTwit|URL=https://twitter.com/Mr_Admirals/status/429062324737953792|Site=Twitter|Page=@HaloWaypoint Hey, what was the population of Earth prior to November 2552?|Y=2014|D=04|M=02}} The refugees of Cleveland, including Tyla, were evacuated to a relief camp in [[Akron]].{{Ref/Reuse|HUI4}}
{{Main|Battle of Voi}}
{{clear|right}}
{{Quote|Marines, the Prophet of Truth doesn't know it yet, but he's about to get kicked right off his throne. You will take our city back. And drive our enemy into the grave they've been so happily digging. One final effort is all that remains.|Admiral Terrence Hood}}
[[File:UNSCHitsDreadnought-large.jpg|thumb|left|250px|Immediately after the Type-27 Mantis deployments has been cleaned, the UNSC frigates initiates an attack on the Forerunner Dreadnought.]]
====Battle for the Portal====
{{Main|Battle of Kenya}}
{{Quote|Marines, the [[Prophet of Truth]] doesn't know it yet, but he's about to get kicked right off his throne. You will take our [[Voi|city]] back. And drive our enemy into the grave they've been so happily digging. [[Battle of Voi|One final effort]] is all that remains.|[[Fleet Admiral]] [[Terrence Hood]]}}


Commander Keyes proposed to destroy the Covenant anti-air defenses at [[Voi]], allowing low flying [[Charon-class light frigate|frigates]] to strike the Forerunner Dreadnought now landed on the Portal. [[Fleet Admiral]] [[Terrence Hood]] had only a few frigates left, but was willing to commit to the risky plan with [[John-117]]'s recovery.<ref name="H3CN"/>
As the Dreadnought entered Earth's atmosphere, John-117 left the ship by leaping off during re-entry and crashing into the [[East African Protectorate|East-African]] jungle.{{Ref/Level|Id=H3S117|Game=Halo 3|Level|Sierra 117}} By this time most of Truth's remaining forces arrived to the now-uncovered Ark portal at Voi and had set up heavy [[Skar'wa-pattern Mantis|AA batteries]] and other defenses near [[Voi]] and in the surrounding area to protect their work at the Portal.{{Ref/Reuse|H3CN}}{{Ref/Reuse|lootcrate2}} During Spartan-117's re-entry, a pair of ODSTs used a [[laser designator]] during [[Battle of Sector Six|an operation]] in [[Sector Six]] (near the [[Pakistan]]-[[wikipedia:Afghanistan|Afghanistan]] border) to track the Spartan's fall.{{Ref/Film|Id=landfall|Film=Halo: Landfall}} The data made it easier for Sergeant Johnson and Thel 'Vadam to locate the Spartan. After [[Recovery of John-117|making their way through the jungle]], they were extracted by a [[D77H-TCI Pelican|dropship]], despite Covenant resistance, and taken to [[Crow's Nest (location)|Crow's Nest]].{{Ref/Reuse|H3S117}} The Covenant tracked them back to the base, however, and [[Attack on Crow's Nest|launched an attack]].{{Ref/Reuse|H3CN}}


[[File:UNSCHitsDreadnought-large.jpg|thumb|left|250px|The UNSC initiates an attack on the Forerunner Dreadnought.]]
Commander Keyes proposed to destroy the Covenant anti-air defenses at [[Voi]], allowing low flying [[Charon-class light frigate|frigates]] to strike the Forerunner Dreadnought now landed on the Portal. [[Fleet Admiral]] [[Terrence Hood]] had only a few frigates left, but was willing to commit to the risky plan with [[John-117]]'s recovery.{{Ref/Reuse|H3CN}}
Just before the UNSC offensive began, the Covenant attacked Crow's Nest. Miranda Keyes evacuated and destroyed the base with a [[Improvised UNSC bomb|bomb]] before it could be occupied. John-117 barely managed to escape the destruction of the facility but met up with [[Gunnery Sergeant]] [[Reynolds]] and set out in [[M12 Force Application Vehicle|Warthogs]] on [[Tsavo highway (location)|Tsavo Highway]] to head for [[Voi]], as did scattered UNSC forces, [[Assault on the Tsavo Highway|engaging]] Covenant heavy vehicles along the way.<ref name="H3CN"/><ref name="H3Tsavo">''Halo 3'', campaign level, [[Tsavo Highway]]</ref>


At Voi, the UNSC broke through Covenant defenses, as John-117 and [[Thel 'Vadam]] disabled a Covenant AA battery. With the path to the Portal cleared, Fleet Admiral Hood ordered three frigates and multiple [[GA-TL1 Longsword|Longswords]] to attack the Forerunner Dreadnought. Despite [[Magnetic Accelerator Cannon|MAC]] fire, the enemy ship remained intact and was able to activate the Portal. The Dreadnought and the remaining Covenant ships departed Earth through the resulting Slipspace portal.<ref name="H3Storm">''Halo 3'', campaign level, [[The Storm]]</ref> Covenant battlenet cohesion broke following Truth's departure, allowing UNSC forces in the southwest URNA to begin a major counteroffensive as part of their [[URNA Southwest Campaign|ongoing campaign]].<ref name="lootcrate2"/>
Just before the UNSC offensive began, the Prophet of Truth hijacked Crow's Nest operations center monitors, broadcasting a message to the base, promising the reduction of Earth to [[glassing|glass]] by the Covenant, and then the Covenant attacked Crow's Nest. Miranda Keyes evacuated and destroyed the base with a [[Improvised UNSC bomb|bomb]] before it could be occupied. John-117 barely managed to escape the destruction of the facility but met up with [[Gunnery Sergeant]] [[Reynolds]] and set out in [[M12 Force Application Vehicle|Warthogs]] on [[Tsavo highway (location)|Tsavo Highway]] to head for [[Voi]], as did scattered UNSC forces, [[Assault on the Tsavo Highway|engaging]] Covenant heavy vehicles along the way.{{Ref/Reuse|H3CN}}{{Ref/Level|Id=H3Tsavo|H3|Tsavo Highway}}
{{Clear}}


===The Flood on Earth===
At Voi, the UNSC broke through Covenant defenses, as John-117 and [[Thel 'Vadam]] disabled the last Covenant AA battery. With the path to the Portal cleared, Fleet Admiral Hood ordered [[Battle Group Victory|at least seven frigates]] and multiple [[GA-TL1 Longsword|Longswords]] to attack the Forerunner Dreadnought. Despite [[Magnetic Accelerator Cannon|MAC]] fire, the enemy ship remained intact and was able to activate the Portal. The Dreadnought and the surrounding Covenant ships departed Earth through the resulting Slipspace portal.{{Ref/Level|Id=H3Storm|H3|The Storm}} Covenant battlenet cohesion broke following Truth's departure, allowing UNSC forces in the southwest URNA to begin a major counteroffensive as part of their [[URNA Southwest Campaign|ongoing campaign]].{{Ref/Reuse|lootcrate2}}
{{clear|left}}
[[File:Voi 7.jpg|thumb|250px|left|Master Chief and the Arbiter witness the arrival of a battlecruiser, but infested by the Flood.]]
===Flood on Earth===
{{Main|Outbreak on Earth}}
{{Main|Outbreak on Earth}}
{{Quote|Quickly! Let us find their ship. Make short work of this abomination!|Thel 'Vadam}}
{{Quote|Quickly! Let us find their [[Indulgence of Conviction|ship]]. Make short work of this [[Flood|abomination]]!|Thel 'Vadam}}
[[File:Voi 7.jpg|thumb|250px|left|The Flood-infected battlecruiser arrives.]]
While the battle for Earth raged, the Covenant had been attempting to maintain a quarantine of the [[Flood]]-infested ''[[High Charity]]'' and [[Installation 05]]. The Flood-controlled ''[[Indulgence of Conviction]]'' escaped and arrived at Earth as the Prophet of Truth departed through the Portal. The ship crashed in Voi and began infesting the area. John-117 and Thel 'Vadam quickly made for the crash site intending to overload the ship's reactor. The explosion would destroy the city but would hopefully stop the spreading infestation as well.<ref name="H3Flood">''Halo 3'', campaign level, [[Floodgate]]</ref>


[[File:H3 Floodgate ODST Concept.jpg|thumb|250px|right|UNSC forces engage the Flood]]
While the battle for Earth raged, the [[Fleet of Retribution]] had been attempting to maintain a quarantine of the [[Flood]]-infested ''[[High Charity]]'' and [[Installation 05]]. The Flood-controlled ''[[Indulgence of Conviction]]'' escaped and arrived at Earth as the Prophet of Truth departed through the Portal. The ship crashed in Voi and began infesting the area. John-117 and Thel 'Vadam quickly made for the crash site intending to overload the ship's reactor. The explosion would destroy the city but would hopefully stop the spreading infestation as well.{{Ref/Level|Id=H3Flood|H3|Floodgate}}
[[Fleet of Retribution|Sangheili]] ships, led by [[Fleet Master]] [[Rtas 'Vadum]] aboard the [[CAS-class assault carrier|assault carrier]] ''[[Shadow of Intent]]'', arrived in pursuit of the Flood. The Sangheili believed [[Cortana]] was aboard the Flood ship; Rtas 'Vadum could give his own troops and the UNSC only a little time to recover the AI before Voi and the surrounding area were cleansed by [[glassing]]. John-117 found the small storage device containing the AI; he entrusted to [[343 Guilty Spark]] for repairs and they were extracted by [[Type-52 Troop Carrier|Phantom]] to ''Shadow of Intent''.<ref name="H3Flood"/>


Thel 'Vadam convinced Rtas 'Vadum to exercise restraint when glassing. Thus, only an area of Africa was glassed instead of a much wider area.<ref name="H3Flood"/>
[[File:H3 Floodgate ODST Concept.jpg|thumb|250px|To prevent the sudden loss of Earth to the alien infestation, UNSC forces engage the Flood before being reinforced by the Sangheili forces.]]
A [[battle group]] of [[Fleet of Retribution|Sangheili ships]], led by [[Fleet Master]] [[Rtas 'Vadum]] aboard the [[CAS-class assault carrier|assault carrier]] ''[[Shadow of Intent]]'', arrived in pursuit of the Flood. The Sangheili believed [[Cortana]] was aboard the Flood ship; Rtas 'Vadum could give his own troops and the UNSC only a little time to recover the AI before Voi and the surrounding area were cleansed by [[glassing]]. John-117 found the small storage device containing the AI; he entrusted to [[343 Guilty Spark]] for repairs and they were extracted by [[Kez'katu-pattern Phantom|Phantom]] to ''Shadow of Intent''.{{Ref/Reuse|H3Flood}}


Shortly after the initial skirmishes with the Flood, the Flood-infested ''High Charity'' jumped out of slipspace further out in the Sol system. Shortly after discovering the presence of the Portal at Voi, the Gravemind conducted an arcane bridging maneuver allowing it to transport the former holy city to the Ark from the vicinity of [[Mars]] rather than physically accessing the portal on Earth; the human homeworld thus escaped further Flood contamination.<ref name="Bulletin924">[https://blogs.halowaypoint.com/en-us/blogs/headlines/posts/the-halo-bulletin-9-24-14 ''Halo Waypoint'' - The Halo Bulletin: 9.24.14]</ref>
Thel 'Vadam convinced Rtas 'Vadum to exercise restraint when glassing. Thus, only an area of [[Africa]] was glassed instead of a much wider area.{{Ref/Reuse|H3Flood}}


===Mopping up remaining Covenant forces===
Shortly after the initial skirmishes with the Flood, the Flood-infested ''High Charity'' jumped out of slipspace further out in the Sol system. Shortly after discovering the presence of the Portal at Voi, the Gravemind conducted an arcane bridging maneuver allowing it to transport the former holy city to the Ark from the vicinity of [[Mars]] rather than physically accessing the portal on Earth; the human homeworld thus escaped further Flood contamination.{{Ref/Site|Id=Bulletin924|URL=https://blogs.halowaypoint.com/en-us/blogs/headlines/posts/the-halo-bulletin-9-24-14|Site=Halo Waypoint|Page=The Halo Bulletin: 9.24.14|Y=2014|M=9|D=24}}
{{Main|URNA Southwest Campaign}}
[[File:H3 - Chasing Truth.png|thumb|left|250px|The Fleet of Retribution leaves through the Portal while Fleet Admiral Hood stays on Earth via Pelican.]]
{{Quote|no=two|1=Terrence Hood|q1=And you, Shipmaster, just glassed half a continent! Maybe the Flood isn't all I should be worried about.|2=Rtas 'Vadum|q2=One single Flood spore can destroy a species. Were it not for the Arbiter's counsel, I would have glassed your entire '''planet'''!|3=Admiral Terrence Hood and Rtas 'Vadum, after the Flood infection of Voi.}}
===Dealing with the Flood===
{{Quote|no=two|1=Terrence Hood|q1=And you, Shipmaster, just glassed half a [[Africa|continent]]! Maybe the Flood isn't all I should be worried about.|2=Rtas 'Vadum|q2=One single [[Flood spore]] can destroy a species. Were it not for the Arbiter's counsel, I would have glassed your entire '''planet'''!|3=Admiral Terrence Hood and Rtas 'Vadum, after the Flood infection of Voi.}}


Admiral Hood and Commander Keyes joined John-117, Thel 'Vadam, and Rtas 'Vadum aboard ''Shadow of Intent'' where 343 Guilty Spark repaired Cortana's damaged storage device. The device contained only a message from the AI; it warned them that the Flood-infested ''High Charity'' was en route to Earth, but that beyond the Portal there was a solution to the Flood without firing the [[Halo Array]].<ref name="H3Flood"/>
Admiral Hood and Commander Keyes joined John-117, Thel 'Vadam, and Rtas 'Vadum aboard ''Shadow of Intent'' where 343 Guilty Spark repaired Cortana's damaged storage device. The device contained only a message from the AI; it warned them that the Flood-infested ''High Charity'' was en route to Earth, but that beyond the Portal there was a [[Installation 08|solution]] to the Flood without firing the [[Halo Array]].{{Ref/Reuse|H3Flood}}


[[File:Floodgate1.jpg|thumb|left|250px|The Fleet of Retribution leaves through the Portal while Fleet Admiral Hood stays on Earth via Pelican.]]
Admiral Hood was determined to make his stand against the Flood on Earth. The Sangheili believed this to be foolish; there was little hope Earth could withstand a [[Flood spore]], never mind a full Flood invasion, and they decided to place faith in Cortana and journey beyond the Portal. John-117 and Keyes convinced a weary Hood to allow them, and a UNSC task force to accompany the Sangheili.{{Ref/Reuse|H3Flood}}
Admiral Hood was determined to make his stand against the Flood on Earth. The Sangheili believed this to be foolish; there was little hope Earth could withstand a Flood spore, never mind a full Flood invasion, and they decided to place faith in Cortana and journey beyond the Portal. John-117 and Keyes convinced a weary Hood to allow them, and a UNSC task force to accompany the Sangheili.<ref name="H3Flood"/>


The final stand Hood expected never came; the next day, ''High Charity'' and the Flood arrived in the Sol system, but instead performed a Slipspace jump from Mars orbit to [[Installation 00]], an action that spared Earth from a second contamination.{{Ref/Site|D=01|M=6|Y=2020|URL=https://forums.halowaypoint.com/yaf_postsm2959975_Query--Catalog.aspx#post2959975|SiteName=Halo Waypoint|PageName=Query: Catalog}} It was at the massive installation that the Flood and the remnants of the Covenant were defeated by the UNSC and Sangheili three weeks later.
The final stand Hood expected never came; the next day, ''High Charity'' and the Flood arrived in the Sol system, but instead performed a Slipspace jump from Mars orbit to [[Installation 00]], an action that spared Earth from a second contamination.{{Ref/Site|D=01|M=6|Y=2020|URL=https://forums.halowaypoint.com/yaf_postsm2959975_Query--Catalog.aspx#post2959975|Site=Halo Waypoint|Page=Query: Catalog}} It was at the massive installation that the Flood and the remnants of the Covenant were ultimately [[Battle of Installation 00|defeated]] by the UNSC and Sangheili three weeks later, bringing an end to the [[Human-Covenant War|war]] that nearly extinguished the [[human]] race.
{{clear}}
===Covenant remnants===
{{Main|URNA Southwest Campaign}}
On November 18, Jiralhanae forces spotted the {{UNSCShip|Crassus}} and its escorts at sea and engaged it using a mixture of [[dropship]]s and [[Qavardu Workshop Prowler|war-sled]]s. While initially successful, the boarding stalled due to the ship's hallways being smaller than their bodies. Lacking any progress, the Jiralhanae destroyed the flight tower and left, leaving the carrier afloat.{{Ref/Site|Id=CFStrike|URL=https://www.halowaypoint.com/news/canon-fodder-ship-strike|Site=Halo Waypoint|Page=Canon Fodder - Ship Strike|D=20|M=04|Y=2023}}


With the majority of Truth's forces now bound for the Ark, the remainder of the Covenant was on Earth as they fortified themselves in [[Arizona]], [[URNA]]. On December 3, Admiral Harper of the Fifth Fleet initiated [[Operation: MARSH FLASH]], which eradicated clusters of Jiralhanae leadership attempting to activate an artifact here, effectively bringing an end to the global battle. Despite suffering enormous military and civilian losses, the UNSC retained control of Earth. Marines involved in mopping up Jiralhanae holdouts employed the "Rex" [[Visual Intelligence System, Reconnaissance|VISR]] system.<ref>'''Halo 5: Guardians''', ''Rex VISR description''</ref>
With the majority of Truth's forces now bound for the Ark, some of the remaining Covenant forces on Earth fortified themselves in [[Arizona]], [[URNA]]. On December 3, Admiral Harper of the Fifth Fleet initiated [[Operation: MARSH FLASH]], which eradicated clusters of Jiralhanae leadership attempting to activate an artifact here. The UNSC was then finally able to repel or wipe out the remaining Covanant invader forces on the planet and the system, effectively bringing an end to the invasion. Despite suffering enormous military and civilian losses, the UNSC retained control of Earth.{{Ref/Reuse|loochapt2}} Marines involved in mopping up Jiralhanae holdouts employed the "Rex" [[Visual Intelligence System, Reconnaissance|VISR]] system.{{Ref/Game|H5|Detail=Rex VISR description}}
{{Clear}}


==Aftermath==
==Aftermath==
{{Quote|Before 2552, there was no way anything like that could happen on Earth. On one of those distant planets in the outer colonies, maybe. But an attack on Earth? Couldn't happen. Until it did. It's called [[glassing]]. Covenant warships rain plasma down on a planet until everything and everyone on the surface melts. Usually, it's complete world destruction. Earth only got a taste. The prolonged orbital bombardment destroyed East Africa, killing millions before it ended. None of us were safe anymore.|[[Benjamin Giraud]]{{Ref/Game|Game=Hunt the Truth|Detail=Episode 01: A Hairline Fracture}}}}
===Battle of Installation 00===
===Battle of Installation 00===
{{Main|Battle of Installation 00}}
{{Main|Battle of Installation 00}}
{{Expand-section}}
{{Expand-section}}


===End of the war===
===Rebuilding and Rebirth===
[[File:Attend2.PNG|thumb|250px|The aftermath of the Battle for Earth.]]
[[File:Attend2.PNG|thumb|250px|The aftermath of the Battle for Earth.]]
{{Main|Hillside Memorial}}
{{Main|Hillside Memorial|Project Rebirth}}
{{Expand-section}}
On [[2553#March|March 3, 2553]], a special ceremony on a hill over looking the Portal at Voi was held to honor the end of the war and those who had fallen.{{Ref/Level|H3|[[Halo (Halo 3 level)|Halo]]}}


===Rebuilding and Rebirth===
The rebuilding of Earth's infrastructure had begun in earnest as early as [[2553#January|January 2553]] in Sydney.{{Ref/Novel|Gla|Chapter=1}} Project Rebirth, an organized effort to rebuild also took place in [[Aranuka]]{{Ref/Reuse|loochapt2}} and [[Mombasa]]{{Ref/Generic|Id=Goldchief|[[McFarlane Toys/Halo Point Prizes]]|[[McFarlane Toys/Halo Point Prizes#Golden Master Chief|Master Chief Statue Press Release]]}} took place at some point, with works in Aranuka being done by [[2558]].{{Ref/Reuse|loochapt2}}
{{Main|Project Rebirth}}
{{clear}}
{{Expand-section}}


==Engagements==
==Engagements==
The battle of Earth had numerous engagements across the planet. Kenya, Cleveland, Havana, and the Southewestern URNA were battlefields. Fighting also took place at [[Sydney]],<ref name="glasslandsp.26"/> [[Cairo]], [[Diego Garcia]],<ref>''[[Halo Encyclopedia]]'', Earth, p. 285, (2009); p. 296 (2011)</ref> [[Aranuka]],{{Ref/Novel|Novel=Halo: Legacy of Onyx|Chapter=2}} the [[Yucatán Peninsula]],<ref name="goop.220"/> and [[Mount Erebus]].<ref name="goo204"/>
The battle of Earth had numerous engagements across the planet. Kenya, Cleveland, Havana, and the Southewestern URNA were battlefields. Fighting also took place at [[Sydney]],{{Ref/Reuse|glasslandsp.26}} [[Cairo]], [[Diego Garcia]],{{Ref/Reuse|encycearth}} [[Aranuka]],{{Ref/Novel|Id=loochapt2|Novel=Halo: Legacy of Onyx|Chapter=2}} the [[Yucatán Peninsula]],{{Ref/Reuse|goop.220}} [[Mount Erebus]],{{Ref/Reuse|goo204}} and [[Berkeley]].{{Ref/Reuse|axon12}}
 
[[Luna]], Earth's moon was also [[Battle of Luna|attacked]].{{Ref/Novel|HNB|Chapter=12}}
 
{{Engagements in the Battle for Earth}}
{{Engagements in the Battle for Earth}}


==Timeline==
==Timeline==
'''October 20, 2552'''
{{Main|Timeline of the Battle for Earth}}
*'''1248 hours''': [[Io Station]] station pings the encroaching [[Fleet of Sacred Consecration]] and relays this data to flag headquarters on [[Cairo Station (station)|Cairo Station]].
*At flag headquarters, [[Fleet Admiral]] [[Terrence Hood]] awards [[John-117|SPARTAN-117]], Staff Sergeant [[Avery Junior Johnson]] and [[Captain]] [[Jacob Keyes]] medals for their efforts during the [[Battle of Installation 04]] and [[Operation: FIRST STRIKE|subsequent actions]], in the case of John-117 and Johnson, now a Sergeant Major. [[Miranda Keyes]] received her late father's medal posthumously.
*'''1412 hours''': The Covenant Fleet, consisting of 2 {{Class|CAS|assault carrier}}s and 13 {{Class|CCS|battlecruiser}}s exits slipspace just beyond the effective range of Earth's [[orbital defense platform]]s Fleet Admiral [[Joseph Harper]] prepares all available vessels to engage the Covenant. This order is overruled by Lord Hood, who instead orders the fleet to form a defensive perimeter around the ODP clusters.
*'''1421 hours''': The Fleet of Sacred Consecration launches [[Type-28 Tick]] boarding crafts toward the orbital defense stations to plant [[antimatter charge]]s. Two are destroyed in the process: [[Athens Station|Athens]] and [[Malta Station]]s. Cairo Station is save from the same fate by the efforts of [[John-117]]. The fleet subsequently clears the defensive grid and sends a first wave toward the planet's surface.
*'''1450 hours''': John-117 uses the antimatter charge brought aboard Cairo to destroy a the ''[[Day of Jubilation]]'', one of the two [[CAS-class assault carrier]]s in the Covenant Fleet.
*'''1459 hours''': The ''[[Solemn Penance]]'', the other assault carrier the [[Prophet of Regret]]'s flagship, blows through the Malta's debris field and heads straight for [[New Mombasa]], [[Kenya]] and deploys ground forces. The [[Battle of Mombasa#First Battle of Mombasa|First Battle of Mombasa]] begins.
*'''1512 hours''': A number of [[Huragok]] deployed to New Mombasa are designated tier-one assets by the [[Office of Naval Intelligence]] and judged to be exposed to capture or kill. One of these, [[Quick to Adjust|Asset RD-9743-X]], would successfully be acquired by ONI in the hours to come.
*'''1557 hours''': A squad of [[ODST]]s, [[Alpha-Five]], confirms the successful procurement of the [[Conduit]], a Forerunner device, from the Covenant pursuant to [[Operation: WINDOW PANE]].
*'''1602 hours''': [[Operation: BUMRUSH]] is greenlit and ODSTS of the [[65th Shock Troops Division]] are launched from the {{UNSCShip|Say My Name}} with the goal of breaching the ''Solemn Penance''.
*'''1603 hours''': ''[[Solemn Penance]]'' makes a sudden slipspace jump only hundreds of meters above the city. The assault carrier is pursued by the {{UNSCShip|In Amber Clad}}, which is in turn followed by two [[UNSC corvette]]s and two other [[UNSC frigate|frigate]]s. This atmospheric slipspace jump creates a massive overpressure wave and [[electromagnetic pulse]]. The ODSTs' [[Single Occupant Exoatmospheric Insertion Vehicle|drop pods]] are scattered throughout the city. With Regret gone, Jiralhanae elements in the fleet suddenly turn on their [[Sangheili]] compatriots, heralding the [[Great Schism]] soon to come.
*'''1606 hours''': Gunnery Sergeant Edward Buck exits his [[Single Occupant Exoatmospheric Insertion Vehicle|drop pod]] and moves toward [[Tayari Plaza (location)|Tayari Plaza]], the location of Captain Veronica Dare's.
*'''1624 hours''': All members of [[Alpha-Five]] are designated KIA and the Conduit is determined to be lost.
*'''1636 hours''': UNSC Marines launch an attack on Covenant occupiers in [[Uplift Nature Reserve]].
*'''1649 hours''': The [[Mombasa Tether]] collapses. 38% of New Mombasa is occupied and controlled by the Covenant forces, now without Sangheili, at this time.
*'''1736 hours''': Fierce fighting is waged along [[Kizingo Boulevard (location)|Kizingo Boulevard]].
*'''1810 hours''': In cooperation with the [[NMPD]], ODSTs from Alpha-Nine set demolition charges on a bridge leading to [[ONI Alpha Site (location)|ONI Alpha Site]], in order to destroy it and slow the Covenant advance in reaching the site.
*'''1852 hours''': [[ONI Alpha Site (location)|ONI Alpha Site]], the Office of Naval Intelligence's headquarters in the [[EAP]], is destroyed by the UNSC and [[New Mombasa Police Department]] in order to deny intelligence to the enemy.
*'''1914 hours''': Gunnery Sergeant Buck and Lance Corporal [[Kojo Agu]] make their way to the [[NMPD headquarters]] for pickup by an [[D77C-NMPD Pelican|NMPD Pelican]]. The pelican is shot down before it can reach them and a skirmish breaks out between Alpha-Nine and Covenant air units.
*'''2141 hours''': Remaining {{Class|CCS|battlecruiser}}s from the Fleet of Sacred Consecration coalesce over New Mombasa.
*'''2101 hours''': Alpha-Nine moves toward [[Kikowani Station (location)|Kikowani Station]], intending to escape the city through the [[MagLev train]] tunnels leading to [[Old Mombasa]].
*'''2206 hours''': Lance Corporal [[Rookie|J.D.]], an ODST from [[Alpha-Nine]], awakens after being knocked out after his [[Single Occupant Exoatmospheric Insertion Vehicle]] was thrust off-course in the wake of the assault carrier's slipspace jump to careen into the side of a building. He begins to search the city for others from Alpha-Nine.
*'''2215 hours''': The [[glassing|excavation]] of the [[Portal at Voi|Excession]] begins.
*'''2227 hours''': The Covenant controls 78% of New Mombasa.
*'''2319 hours''': [[Quick to Adjust|Asset RD-9743-X]] is sighted and reported by Captain [[Veronica Dare]] beneath New Mombasa in its [[New Mombasa Data Center|data center]].
*'''2324 hours''': 94% of New Mombasa is lost to the Covenant.
*'''2359 hours''': Gunnery Sergeant [[Edward Buck]] rendezvouses with Veronica Dare and Lance Corporal [[Rookie|J.D.]] The Huragok, [[Quick to Adjust|Asset RD-9743-X]], is reported as secured.
 
'''October 21, 2552'''
*[[Truth's Fleet|Another Covenant fleet]] arrives at Earth.
*New Mombasa is fully occupied by the Covenant and it and its surroundings are [[Glassing|glassed]] in efforts to uncover [[The Portal|the portal]]. Alpha-Nine extracts [[Quick to Adjust|Asset RD-9743-X]] from the city safely.
 
'''October 20 through November 3, 2552'''
*[[Spartan-II]] [[Blue Team]], composed of [[Frederic-104]], [[Linda-058]], and [[William-043]], is deployed on numerous zero-gee operations to repel Covenant warships over Earth. They team also participates in numerous combat missions around the world, including the [[Battle of Ross Island]] in [[Wikipedia:Antarctica|Antarctica]] and an engagement with Covenant forces on the sea floor off of the Yucatan Peninsula.
 
'''November 3, 2552'''
*'''1420 hours''': Blue Team is deployed to Cuba, where the [[Battle of Havana]] is underway.
*'''1550 hours''': The [[Centennial Orbital Elevator]] is recaptured from the Covenant but destroyed by the intentional detonation of nuclear devices in close proximity to its upper reaches. Shortly thereafter, the team uses a [[Bloodied Spirit|captured Covenant Destroyer]] to depart for [[Onyx]].
 
'''November 10, 2552'''
* The [[Covenant]] begins to excavate and occupy built-up positions centered at [[Free-fire Area OZONE]] in Arizona, [[United Republic of North America]], while also attempting to activate an artifact there.
 
'''November 15, 2552'''
*'''1725 hours''': [[Avery Johnson]] interrogates [[Quick to Adjust]], the Huragok recovered from New Mombasa, at the [[Quito Terminus|terminus]] of the [[Quito Space Tether]].
 
'''November 17, 2552'''
*The Forerunner Dreadnought arrives at Earth. Spartan 117 bails from the ship, landing in a Kenyan jungle. He is [[Recovery of John-117|recovered]] by a group of Marines led by [[Avery Johnson]].
*The Marines, with Spartan-117, make their way to Crow's Nest, where a plan for a counterattack is devised. The base is [[Attack on Crow's Nest|invaded]] by the Covenant, and eventually destroyed by the UNSC.
*The UNSC forces [[Assault on the Tsavo Highway|assault]] the Covenant-held Tsavo Highway, eventually clearing the path to the town of Voi.
*UNSC Forces [[Battle of Voi|neutralize]] Covenant anti-air defenses in Voi. A [[Battle Group Victory|battle group]] from the UNSC Home Fleet initiate the assault on the Forerunner Dreadnought, with no effect. The Portal is activated. Covenant forces flee to Installation 00 through the Portal.
*Immediately thereafter, a Flood-controlled ship emerges from Slipspace over Voi, crashing to the town. Flood infestation starts spreading around the region. The Sangheili Fleet of Retribution, having given chase, arrives at Earth and glasses Voi as well as its surroundings.
*A transmission from the UNSC AI Cortana is retrieved from the Flood ship. The Sangheili fleet, along with the UNSC ''Forward Unto Dawn'' go through the Portal to the Ark.
*UNSC forces launch a counteroffensive against the Covenant at free-fire area OZONE.
 
'''November 19, 2552'''
*'''0630 hours''': UNSC flagword [[LUX]] is declared and UEG emergency broadcast is initiated.
*'''0700 hours''': A tactical nuclear deployment is carried out against multiple shielded Covenant positions.
 
'''December 3, 2552'''
*[[Operation: MARSH FLASH]] sees clusters of Jiralhanae leadership eliminated.


==Participants==
==Participants==
{{Main|Participants in the Battle for Earth}}
{{Main|Participants in the Battle for Earth}}
Due to the promenince of Earth, and what had transpired prior to the battle, Earth possessed numerous UNSC assets. They clashed with several waves of Covenant forces.
Due to the prominence of Earth, and what had transpired prior to the battle, Earth possessed numerous UNSC assets. They clashed with several waves of Covenant forces.


==Production notes==
==Production notes==
Many fans, as well as ''Halopedia'', used to regard the Battle of Earth as two separate battles. Namely, the "First" was believed to comprise the events of ''[[Halo 2]]'' and the "Second" was thought to cover the events of John-117's return at the beginning of ''[[Halo 3]]''. Later sources have established that Truth's reinforcements arrived just hours after Regret fled, indicating that the "two" battles were one and the same. However, the ''Halo Encyclopedia'' (even the 2011 revised edition) lists them as two separate battles; this is one of several elements of the ''Encyclopedia'' that is seemingly lifted from this wiki.
Many fans, as well as ''Halopedia'', used to regard the Battle of Earth as two separate battles. Namely, the "First" was believed to comprise the events of ''[[Halo 2]]'' and the "Second" was thought to cover the events of John-117's return at the beginning of ''[[Halo 3]]''. Later sources have established that Truth's reinforcements arrived just one day after Regret fled, indicating that the "two" battles were one and the same. However, the ''Halo Encyclopedia: The Definitive Guide to the Halo Universe'' (even the 2011 revised edition) lists them as two separate battles; this is one of several elements of the ''Encyclopedia'' that is seemingly lifted from this wiki.


==Gallery==
==Gallery==
<gallery>
<gallery>
File:H2A-pavel-belov-cairo-external.jpg|Concept art of the space battle taking place around ''Cairo Station'' for ''Halo 2: Anniversary''.
File:H2A Terminals - Fleet at Io.jpg|The [[Fleet of Sacred Consecration]] arrives in the Sol System near ''[[Io Station]]''.
File:H2A Terminals - Fleet at Io.jpg|The [[Fleet of Sacred Consecration]] arrives in the Sol System near ''[[Io Station]]''.
File:H2A-fleet readout.jpg|Lord Hood views a readout of the opposing fleets as they prepare to engage.
File:H2A-fleet readout.jpg|Lord Hood views a readout of the opposing fleets as they prepare to engage.
Line 332: Line 318:
File:H2A - Battle of Earth from Cairo.jpg|The space battle as viewed from ''Cairo Station'' as the Home Fleet holds its ground against the Covenant assault.  
File:H2A - Battle of Earth from Cairo.jpg|The space battle as viewed from ''Cairo Station'' as the Home Fleet holds its ground against the Covenant assault.  
File:UNSC Fleet.jpg|The Home Fleet engages the Covenant fleet above Earth in full force.
File:UNSC Fleet.jpg|The Home Fleet engages the Covenant fleet above Earth in full force.
File:H2A-Battlecruisers Battle of Earth.png|{{Class|CCS|battlecruiser}}s engaging the UNSC Home Fleet above Earth.
File:H2A-Battlecruisers Battle of Earth.png|{{Pattern|Ket|battlecruiser}}s engaging the UNSC Home Fleet above Earth.
File:H2AMinors.jpg|The Master Chief battles Covenant boarding parties on ''Cairo Station''.  
File:H2AMinors.jpg|The Master Chief battles Covenant boarding parties on ''Cairo Station''.  
File:Athensstation.jpg|Several ODPs were destroyed through the course of the battle in space.
File:Athensstation.jpg|Several ODPs were destroyed through the course of the battle in space.
Line 351: Line 337:
File:H3ODST_MombasaBattle_Concept.jpg|''Halo 3: ODST'' concept art depicting UNSC and Covenant forces engaged in a firefight.
File:H3ODST_MombasaBattle_Concept.jpg|''Halo 3: ODST'' concept art depicting UNSC and Covenant forces engaged in a firefight.
File:Fleetwatch.jpg|Covenant warships swarm into New Mombasa to resume excavation of the Forerunner artifact.  
File:Fleetwatch.jpg|Covenant warships swarm into New Mombasa to resume excavation of the Forerunner artifact.  
File:H2A - Earth and Dreadnought.jpg|The Forerunner Dreadnought ferrying Truth jumps into Earth Orbit where the space battle continues to rage.
File:Excessionsatellite.png|Surveillance footage captures the Covenant glassing of New Mombasa, revealing the Portal and laying waste to the African landmass.  
File:Excessionsatellite.png|Surveillance footage captures the Covenant glassing of New Mombasa, revealing the Portal and laying waste to the African landmass.  
File:ODST Fast roping.png|ODSTs deploy into Cleveland to rescue the city's enslaved population.
File:ODST Fast roping.png|ODSTs deploy into Cleveland to rescue the city's enslaved population.
File:Battle_of_Earth_Main.jpg|The UNSC Home Fleet engages newly-arrived Covenant forces led by the Prophet of Truth.
File:Battle_of_Earth_Main.jpg|The UNSC Home Fleet engages newly-arrived Covenant forces led by the Prophet of Truth.
File:S117returnstoEarth2552.jpg|John-117 and the Dreadnought entering Earth's atmosphere.
File:H3 Sierra 117 Reynolds captured.jpg|Reynolds being interrogated by a Jiralhanae Captain.
File:UNSC_screens.jpg|Screens showing force deployments late in the battle.
File:UNSC_screens.jpg|Screens showing force deployments late in the battle.
File:Halo-3-The-Storm-15-AV-14-VTOL-HORNET.jpg|Hornet and Banshee aircraft battling in the skies above Voi.
File:Halo-3-The-Storm-15-AV-14-VTOL-HORNET.jpg|Hornet and Banshee aircraft battling in the skies above Voi.
Line 361: Line 346:
File:Voi assault 4.png|The Portal begins to activate after the UNSC's failed assault on the Dreadnought.
File:Voi assault 4.png|The Portal begins to activate after the UNSC's failed assault on the Dreadnought.
File:Halo3 E3 TRAILER 2007 720p30 ST 6300Kbps 002 0001.jpg|The Fleet of Retribution ships glass Voi and its surroundings to contain the Flood threat.
File:Halo3 E3 TRAILER 2007 720p30 ST 6300Kbps 002 0001.jpg|The Fleet of Retribution ships glass Voi and its surroundings to contain the Flood threat.
File:Final meeting 7.png|UNSC and Sangheili leaders hold their meeting aboard the ''[[Shadow of Intent]]'' after the battle.
File:Final meeting 7.png|UNSC and Sangheili leaders hold their meeting aboard the ''[[Shadow of Intent]]''.
File:Cleveland in 2552.PNG|Covenant forces invade Cleveland.
</gallery>
</gallery>


==List of appearances==
==List of appearances==
{{Col-begin}}
{{Col-2}}
*''[[Halo: First Strike]]''
*''[[Halo: First Strike]]''
**''[[Halo: First Strike#2010 bonus content|Adjunct]]''
**''[[Halo: First Strike#2010 bonus content|Adjunct]]''
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*''[[Halo 3: ODST]]''
*''[[Halo 3: ODST]]''
**''[[Sadie's Story]]''
**''[[Sadie's Story]]''
*''[[Halo Legends]]''
**''[[Origins]]''
{{Col-2}}
*''[[Halo: Evolutions - Essential Tales of the Halo Universe]]''
*''[[Halo: Evolutions - Essential Tales of the Halo Universe]]''
**''[[Palace Hotel]]''
**''[[Palace Hotel]]''
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*''[[Halo: Legacy of Onyx]]'' {{Mo}}
*''[[Halo: Legacy of Onyx]]'' {{Mo}}
*''[[Halo: Official Spartan Field Manual]]''
*''[[Halo: Official Spartan Field Manual]]''
*''[[Halo Infinite: Memory Agent]]'' {{Mo}}
*''[[Halo Infinite]]''
*''[[Halo: Outcasts]]'' {{Mo}}
{{Col-end}}


==Notes==
==Notes==
<references group="note"/>
{{Ref/Notes}}


==Sources==
==Sources==
{{Ref/Sources|2}}
{{Ref/Sources|2}}
{{Human-Covenant War}}
{{Human-Covenant War}}
[[Category:UNSC Victories]]
{{DEFAULTSORT:Earth}}
[[Category:Covenant victories]]
[[Category:Engagements in the Battle for Earth| ]]
[[Category:UNSC victories|Earth]]
[[Category:Battles of the Human-Covenant War|Earth]]

Latest revision as of 09:16, August 8, 2024

This article is about the major battle at the end of the Human-Covenant War. For smaller conflicts during the post-war era, see Battle of Earth (disambiguation).

Previous:

Concurrent:

Next:

Battle for Earth
A multimedia collage of the Battle for Earth. Images used starting from top left going clockwise: File:H2A - BattleofEarth.png, File:Orphic Spear 1.png, File:Time to Believe.jpg, File:Cleveland in 2552.PNG (edited to remove text), File:Battle of Sector Six 09.png, File:Voi 7.jpg.
Clockwise from top left: The Fleet of Sacred Consecration above the European Union; Alpha-Five dropping into Mombasa; John-117 supposedly at the Second Battle of New Mombasa; a Ket-pattern battlecruiser over Cleveland; a Phantom reinforcing the Covenant in Sector Six; John-117 and Thel 'Vadam watch as Indulgence of Conviction crash lands into Voi.

Conflict:

Date:

October 20, 2552[1][2] – c. December 3, 2552[Note 1][2]

Location:

Earth, Sol system

Outcome:

UEG/Fleet of Retribution victory

  • Covenant invasion successfully repelled; most surviving forces flee to Installation 00
  • Earth brutally bombarded[3] but full glassing averted; parts of Africa are, including in the excavation of the Portal at Voi
  • Catastrophic reduction of Earth's population[4] and majority of cities destroyed[5]
  • Local Flood infestation contained[6]
Details
Belligerents

Post-Great Schism:

  • Flood (briefly on November 17)
Commanders

Post-Great Schism:

Pre-Mombasa:

Post-Mombasa:

Gravemind

Strength

See here for details on participating forces


Post-Great Schism:

See here for details on participating forces

Casualties

Extreme[3]

Very heavy

  • Massive terrestrial and exoatmospheric losses[16]
    • Majority of the Fleet of Sacred Consecration

Completely sterilized

Civilian casualties

Civilian losses in the billions[17]

 
Battle for Earth

This article is part of a series on the
Battle for Earth



To check out information for other Human-Covenant War battles, see here!
vde

"We ran from them. They followed. We thought they'd never find us... we were wrong."
Cortana[18]

The Battle for Earth,[19][12] also referred to as the Earth Sustained Defense Campaign,[2] was one of the largest, bloodiest and latest engagements fought between the Covenant and the forces of the Unified Earth Government (primarily those of the United Nations Space Command), at the end of the approximately twenty-seven year-long[Note 2] Human-Covenant War, which took place on and above the planet Earth from October 20 to at least December 3, 2552.[Note 1] It was one of the most important battles of the war, as the fate of humanity depended on the survival of its homeworld and seat of its government.[Note 3]

Though the invasion took place on a global scale, the most significant conflicts occurred in the East African Protectorate in the form of three battles fought within and between the cities of Mombasa and Voi, collectively referred to as the first, second, and third battles of Mombasa.[20] The conflict began when the Fleet of Sacred Consecration, under the command of the Prophet of Regret, arrived on October 20 with intentions of traveling through the portal that a luminary in its possession pointed to. This move was made without the consent of the other two Hierarchs and in ignorance regarding the status of this planet as humanity's homeworld. Faced with the full might of the UNSC Home Fleet, it was not long before Regret's flagship fled to Installation 05. Soon after this, the Prophet of Truth initiated his plans to replace Sangheili with Jiralhanae and assume control over the entirety of the hierarchal triumvirate. The Jiralhanae occupation forces left behind by Regret assumed control of all remaining local Covenant forces on and over New Mombasa by secretly killing all abandoned Sangheili in the city to secure Truth's later arrival following the beginning of the Great Schism. Later on the next day, a large Jiralhanae support and excavation fleet sent by Truth was then dispatched to Mombasa and begin to glass most of Kenya, alongside the remnants of Regret's fleet while additional Covenant reinforcements continued to appear in the system and began a resurgent and larger assault on the planet.[21][13][2]

At this point, the fight for Earth began in earnest. Smaller battles were waged all across the world, from the UEG capital of Sydney, Australia, to Cleveland, URNA, to Havana, Cuba, and to Mount Erebus, Antarctica and multiple other locations even when the Sangheili and now Jiralhanae-led Covenant forces turned on each other following the beginning of the Great Schism.[22][5][9][2] By November 17 after very hard fighting, most of the Home Fleet had been obliterated by substantial Covenant naval forces loyal to the Prophets, including the Prophet of Truth,[15] and the majority of cities were destroyed as well throughout the battle.[23] After defenders and the orbital defense grid were overwhelmed, the Earth had been massively devastated by a large Covenant bombardment, resulting in catastrophic human casualties.[3] It was on this date that the Prophet of Truth himself, aboard the Forerunner Dreadnought and with Spartan-117 in tow, arrived and headed straight for the Excession, by then fully excavated. Upon interfacing with the keyship, the portal was activated and a large contingent of the remaining Covenant fleet under the Prophet's command departed through the Portal with the intention of activating the Halo Array from the Ark.[24]

Almost immediately after this, the Flood arrived aboard a captured Ket-pattern battlecruiser, which crashed down in the town of Voi. A battle group assigned to the Fleet of Retribution, a Covenant separatist fleet allied with the UNSC against Truth and his loyalists, was permitted to glass a large portion of Kenya to prevent the parasite's spread. With the threat from the Flood dealt with and the bulk of Covenant forces gone, several UNSC forces accompanied the Fleet of Retribution in pursuit of Truth.[6] The remainder of UNSC forces remained behind to defend Earth from an expected full-scale Flood invasion and also began a major counteroffensive to eliminate all Covenant that remained.[6][2]

Official accounts report that, faced with the potential of human extinction at the hands of an alien hegemony, a significant number of civilians joined the UNSC forces to repel the Covenant throughout the campaign on Earth with many becoming an instrumental part of the war effort.[12][5]

Background

The Human-Covenant War was a decades-long conflict wherein the Covenant hegemony was determined to exterminate all of humanity at the behest of its three Hierarchs, who falsely considered humans as representing the living embodiment, and thus discreditation, of their religion's gods at the time of their discovery. Also a goal of the empire, from long before first contact with humanity, was the location and activation of the Halo rings.

Preparations

In 2550, preparing for a possible battle at Earth, the UNSC reactivated the museum ship UNSC Crassus.[25]

In the aftermath of the Fall of Reach, the UNSC began to pull the majority of its forces back to Earth, with most units assigned to defend Earth's six tether cities.[26]

Formation of the Home Fleet

From May 14–19, 2552, UNSC forces in the Earth Defense Coordination Zone were placed at maximum readiness levels and all warships with magnetic accelerator cannons self-deployed or towed to rally points. Cairo Station was established as flag headquarters. Following September 5, 2552, all remaining naval forces were consolidated into a single command grouping: the UNSC Home Fleet. Fleet Admiral Joseph Harper was appointed senior flag officer and given primary administrative and tasking authority over all assets in the Sol system under emergency directives authorized by UNSC High Command and approved by the UEG Security Council. Remaining expeditionary and defense fleets retained administrative control over their battle groups, though all type commands were dissolved.[2]

Earth compromised

Erde-Tyrene, as represented by the luminary discovered on Meridian.
Main article: Operation: FIRST STRIKE

The Prophet of Truth discovered the location of Earth after the Fall of Reach, but withheld knowledge of this discovery from the rest of the Covenant leadership.[13] To attack the human homeworld, he ordered an assault fleet to secretly assemble at Unyielding Hierophant station in the Tau Ceti system. The fleet would overwhelm Earth's defenses in a single decisive strike.[13][27] The fleet was discovered by the UNSC AI Cortana and a preemptive strike was led by Vice Admiral Danforth Whitcomb and a SPARTAN-II, strike team, which successfully destroyed Unyielding Hierophant and almost the entirety of the assembled fleet, some five hundred ships.[13][28] Earth was granted a small reprieve.

The Prophet of Regret also independently learned of the location of Earth that was known as Erde-Tyrene as the location of a Forerunner artifact, the Portal leading to the Ark. This revelation came after long study by stewards of a Forerunner luminary taken from the moon, Meridian, in 2551. Not being privy to Truth's information, Regret set off to uncover the artifact without any knowledge that Erde-Tyrenne was the humans' homeworld. Regret unknowingly led his small fleet, a mere two assault carriers and thirteen battlecruisers, straight into Earth's formidable defenses.[13] Truth belatedly learned of Regret's expedition to Earth, and dispatched a large Jiralhanae-led support and excavation fleet to reinforce the remaining forces of the initial fleet. They arrived almost one day after Regret had fled.[13][21]

Battle

Arrival of Regret's fleet

"Something's not right. The fleet that destroyed Reach was fifty times this size!"
Fleet Admiral Terrence Hood[10]

The High Prophet of Regret's fleet was detected near Jupiter's moon Io, as a series of slipspace "whispers". Probes were sent to investigate, but shortly afterwards the Covenant fleet exited slipspace near Earth, just outside the killzone of the planet's orbital defense platforms. UNSC forces went to TACCON Alpha 2. Fleet Admiral Harper ordered his battle group of the Fifth Fleet to attack, but quickly received new orders from Fleet Admiral Terrence Hood to fall back and defend the ODPs. Having expected an overwhelming enemy offensive in the style of the Battle of Reach, the relative weakness of the attack puzzled the defenders.[10]

Orbital Defense

Fleet Admiral Harper: "First Echelon, you're with me, blanket those cruisers, take ‘em out one by one. Second Echelon, keep those carriers busy."
Cortana: "Registering all hostile vessels inside the kill zone. Thirteen cruisers, two assault carriers. I'm going loud!"
Fleet Admiral Harper and Cortana as the space battle between opposing fleets rages.[10]
The battle in space takes place despite Regret's fleet being outnumbered by the UNSC Home Fleet.

The assault carriers converged on the battle cluster including Athens Station, Cairo Station and Malta Station.[10] The ODPs opened fire as the enemy entered range. Covenant troops boarded the stations, intending to demolish them with a Chershi-pattern antimatter charge each. As each bomb was planted the Covenant withdrew. Athens and Malta were demolished in quick succession. Cortana, aboard Cairo, deduced the nature of the threat and John-117 was dispatched to prevent the same fate from befalling Cairo.[10]

Cortana directed the SPARTAN-II to the bomb's location in Cairo's fire control center. En route to the bomb, John-117 rescued Commander Miranda Keyes and allowed her to board UNSC In Amber Clad. The frigate departed Cairo to join the fray.[10]

Meanwhile, Harper's Fifth Fleet continued to engage the Covenant task force in Earth orbit, sustaining huge losses in the wake of the Covenant's superior firepower but still prevailing through sheer numbers against the unusually small Covenant force. However, even as their escorts were effectively routed by the UNSC, the two assault carriers pushed onward, bypassing much of the already battered human fleet even as they too came under fire.[10]

The two assault carriers began to break through toward Cairo. Cortana directed Cairo's MAC against the Solemn Penance, but the ship did not stop to engage and instead made directly for New Mombasa on the surface. Admiral Harper led the attack on the second carrier and depleted its shields. Keyes volunteered to attack the carrier immediately, but Hood was unwilling to pit a single frigate against so large a target.[10]

The solution to the second carrier came from an unexpected angle. John-117 and Cortana managed to defuse and capture the Covenant antimatter bomb aboard Cairo, and the Spartan volunteered to go EVA and personally plant the bomb on the last carrier. With Lord Hood's approval, John-117 leapt out of an airlock with the bomb using only the initial explosive decompression for impulse. Longsword interceptors opened a breach in the carrier's hull and allowed the Spartan to infiltrate and plant the bomb internally. The detonation destroyed the ship. John-117 escaped using the same means he had arrived and free fell to the UNSC In Amber Clad.[10]

Earthside

"Dear humanity, we regret being alien bastards, we regret coming to Earth, and we most definitely regret the Corps just blew up our raggedy-ass fleet!"
— Avery Johnson commenting on Regret's message.[29]
Main article: Battle of Mombasa
Concept art for the campaign level Metropolis in Halo 2: Anniversary.
A Scarab attacks the city at the start of the invasion on New Mombasa.

Regret's carrier came to arrive over New Mombasa in the East African Protectorate via slipspace and deployed troops into the city and the surrounding area in an attempt to clear and secure it.[30][31][29] While the Mombasa Tether had been shut down, the city's population were trying to leave the city.[32][31] While the UNSC, militias and armed citizens was fighting against the Covenant forces, UNSC high command wished to discover why the Covenant were landing only in Mombasa, and John-117 was ordered to capture Regret for interrogation. The Spartan deployed with marines and ODST in a trio of Pelicans from the UNSC In Amber Clad near the city. The dropships were shot down by a Covenant Scarab in Old Mombasa.[29] John-117 and the survivors regrouped and pursued the walker to NM 105E, and across the bridge to New Mombasa Sector B. At the time, the Alpha-Five was tasked to recover the Conduit that was brought by the Covenant on the city while another ODST squad were ordered to retrieve information the Covenant were interested in.[33] The Scarab was eventually trapped and destroyed by John-117 at the end of a canal. Covenant forces started to withdraw to the carrier for slipspace departure to the Halo Installation 05.[34]

In orbit the Home Fleet began deploying ODSTs to Mombasa in SOEIVs, intending to board the carrier and capture the Prophet of Regret. One Squad, Alpha-Nine, deploying from the UNSC Say My Name and led by Gunnery Sergeant Edward Buck, was diverted by ONI to secure the city's infrastructure AI.[35]

Regret's means of escape took the UNSC by surprise. The carrier initiated a slipspace jump while still over the city. By this time, Lord Hood originally attempted to intercept the Covenant carrier by dispatching two Marathon-class heavy cruisers at New Mombasa.[34] The UNSC In Amber Clad quickly recovered John-117 and the light frigate along with UNSC Paris, UNSC Redoutable, UNSC Coral Sea were fast enough to follow the carrier into slipspace while UNSC Dusk only followed in the fleeing ship's wake.[36] The slipspace rupture severely damaged the city[34] and generated an EMP. Many ODSTs had not yet landed when the carrier escaped and were caught in the EMP and blast. Drop pods were disabled in flight and plunged into uncontrolled freefall. Those who survived the blast were scattered across the city.[35]

Around this time, Covenant forces also attacked Cairo, Egypt[22] and Berkeley, URNA. At Berkeley, a Covenant starship, possibly a Ket-pattern battlecruiser from the Fleet of Sacred Consecration, began deploying its Seraph fighters on the city.[37][Note 4]

Covenant reinforcements

Fall of Mombasa

Veronica Dare: "When did this happen?"
Edward Buck: "They started showing up right before I went underground."
Captain Veronica Dare and Gunnery Sergeant Edward Buck viewing a second and larger fleet of Covenant starships circling Mombasa.[38]
After fully securing the East Africa, the Jiralhanae excavation fleet begin to uncover the Portal at New Mombasa.

Immediately following the slipspace event, Jiralhanae forces loyal to the High Prophet of Truth, who had embedded said troops into his political rival Regret's fleet,[19] enacted their leader's orders. The Jiralhanae violently displaced their Sangheili commanders left in the initial fleet both ground-side,[39] and in orbit, and then seized the full control of Covenant forces at Mombasa in order to secure Truth's arrival on the Portal by his loyalists,[1] the beginning of Truth's plan to place the Jiralhanae as the Covenant's primary warrior race.[13] While High Charity and the rest of its fleet were following the Solemn Penance on their way to the newly discovered Halo Installation 05, the murder of Regret's Sangheili forces remained secret from the rest of the Covenant.

Surviving UNSC forces in the city, aided by the New Mombasa Police Department, continued to resist, but were eventually overwhelmed. The next day on October 21, a Jiralhanae-led support fleet sent by Truth arrived at the African continent, joining the remains of Regret's fleet as the combined fleet began glassing Mombasa and the surrounding area together, uncovering the Portal to the Ark.[21][13] Captain Dare and her ODST squad managed to secure the city's infrastructure AI and escape before the city fell to the enemy.[38] These forces of the new fleet was both archaeological and military.[40] While a handful of ships of the second fleet engaged Earth's forces, the majority of the fleet was preoccupied for the excavation of the massive slipspace portal.[41]

Covenant occupation

"So then the Covenant fleet really starts to tear into the orbital defenses. It's getting ugly up there. Major skirmishes with the Second, Seventh, and Sixteenth Fleets."
Sergeant Laura "Smokes" Tanner[9]
UNSC and Covenant forces fight each other for supremacy of Earth.

The battle spread all over the globe in the following days and weeks with more and more Covenant fleets of multitude of warships continuing to arrive and attacked targeting cities and areas globally after the full compromise of Earth,[23][9][2] led by Jiralhanae and Sangheili commanders.[5][7] At the same time as these events, other colonies and parts of the Sol system such as Luna and Mars came under assault by the Covenant.[2]

While maintaining a significant presence in orbit, the Covenant ships deployed ground forces to multiple targets around the globe.[9] However, due to many Covenant forces, notably those under the command of the Prophet of Truth and his Jiralhanae loyalists, that were concentrating their forces at Kenya for the excavation of the Portal at Voi, some of their forces were sometimes disorganized, hence less effectual.[2] A Second Battle of New Mombasa between the UNSC and Jiralhanae-led Covenant ground forces takes place shortly after the first battle over seven days[42] before the end of October.[43] The Spartan Blue Team, consisting of Frederic-104, Linda-058, and William-043, were constantly engaged for the first two weeks. They repelled enemy ships in orbit in numerous zero-gee operations whilst on the surface they neutralized Covenant excavations, first on Ross Island in Antarctica,[9] and then underwater off the Yucatan Peninsula.

London in the 26th century.
London, one of many major cities to fall under Covenant occupation.

Sydney, Australia was one of the cities invaded by the Covenant during the engagement due to its importance in UNSC's war effort. Though the city suffered heavy damage by Covenant bombardment, the UNSC's HIGHCOM Facility Bravo-6 remained undamaged.[44] Diego Garcia, following its effective attacks against the initial Covenant forces during the Battle of Mombasa, was attacked by a Covenant capital ship to destroy the base around November, but the base managed to survive the attack.[22][45] Aranuka, a vast city-platform built, was aggressively invaded by the Covenant, killing thousands of Aranukan inslanders, and much of the city was destroyed in their research for a supposed hidden Forerunner artifact. Despite heavy casualties, the UNSC was able to drift the alien invaders away and the Aranuka Space Tether survived the siege of the city.[46]

Elsewhere, Jiralhanae forces landed in London, Britain and soon established an occupation of the city. UNSC forces were deployed into the city to evacuate civilians, including future SPARTAN-IV commander Laurette Agryna.[47][48]

On November 3, the Great Schism finally erupted among the Covenant with all now-casted out Sangheili and Covenant forces, now led by the Jiralhanae as the new dominant military backbone of the hegemony, turning and fighting each other which resulted many Sangheili being allied with the UNSC following the death of the Chieftain of the Jiralhanae Tartarus during the Battle of Installation 05.[15] During that time, the Spartan Blue Team were deployed to Havana, Cuba, where they stole the enemy Jiralhanae destroyer Bloodied Spirit, and destroyed another destroyer and the Centennial Orbital Elevator. They subsequently redeployed aboard the stolen ship to the Forerunner shield world Onyx to aid Dr. Catherine Halsey, the creator of the SPARTAN-II program.[49] During the same day, 3 UNSC expeditionary fleets of the Home Fleet: the Second, Seventh, and Sixteenth Fleets were contesting Earth orbit against numerous Covenant vessels during major orbital skirmishes as the fighting in orbit is scattering the orbital defense,[9] but the Covenant continued to raid the surface in search of Forerunner artifacts, with many under the Prophet of Truth's command mostly concentrating in East Africa.[41]

On November 10, Covenant forces began to excavate and occupy built-up positions centered around Free-fire Area OZONE in Arizona, URNA.[2] As of mid-November, the majority of cities were destroyed over the course of the Battle for Earth,[23] and the population of Earth was already reduced to 5 billion earlier this month.[50]

Truth arrives

Fleet Admiral Terrence Hood: "Master Chief, you mind telling me what you're doing on that ship?"
Master Chief: "Sir, finishing this fight."
— Admiral Terrence Hood and John-117, as the Keyship arrived at Earth.
John-117 attempting to assassinate the Prophet of Truth before the Prophet's death being foiled by a Kig-Yar Sniper.

Near the conclusion of the Battle of Installation 05, the Prophet of Truth departed High Charity, near Halo Installation 05, in the Forerunner keyship Anodyne Spirit on November 3, arriving at the Sol system on the November 8 and proceeding on course towards Earth at near-relativistic speeds.[1] The prophet sought to activate the Ark, fire the Halo Array, and begin what he thought would be the "Great Journey". After the loss of High Charity to the Flood, the Covenant reorganized to make a final push offensive on Earth,[15] as the Prophet of Truth took many remaining Covenant fleets at his disposal following his departure.[51] However, upon his arrival, the Prophet quickly learned that John-117 had stowed away aboard the ship and its crew then became preoccupied with finding and eliminating the Spartan.[52]

By this time, the Prophet of Truth led the largest Covenant invasion force recorded by the UNSC at that point in the war to Earth: a very massive Covenant combined armada, presumably both larger than the one used during the Fall of Reach and containing at least over three hundreds ships – including the remaining loyalist starships and fleets of the High Charity defense fleet – as the final contingent of his forces.[14][53][53][51] The fleet would later breach the Lunar perimeter,[3] and then engage the UNSC Home Fleet, which was already weakened by the previous invasion fleets over Earth, at some point prior to the Forerunner Dreadnought's arrival on Earth as the November 17 dawned.[15]

Whilst on Installation 05, Commander Miranda Keyes, Sergeant Major Avery Johnson, and Arbiter Thel 'Vadam learned of the Prophet of Truth's intentions and departed the installation after the Anodyne Spirit while Rtas 'Vadum and most of Sangheili vessels under his command, comprising hundreds of ships, stayed behind on Installation 05 in order to quarantine and glass the Halo ring as well as quarantine High Charity in order to stop the escape of the Flood and the Gravemind from both the Halo and the city. Upon arrival at Earth on or just before November 15 aboard one of the Sangheili vessels,[2][52] they took up station in an old military base, Crow's Nest, near Voi, and waited for John-117 to arrive.[3][Note 5] On November 15, Sergeant Major Johnson and the ONI interrogated Quick to Adjust, a rebel Huragok since the Regret's attack on New Mombasa, to share information he had and relating to the Portal at Voi.[2][38]

Turning the tide

Main articles: Scramble onboard Forerunner Dreadnought, Battle of Cleveland

Colonel James Ackerson: "See, that's why you're going to lose. All your pomp and thinking you're right about everything... when it comes down to it you're just dumb and arrogant and--"
Shipmaster Lepidus: "That's why we'll win."
Colonel James Ackerson's last words before his demise at the hands of Lepidus, and Lepidus after executing James.[16]
The Forerunner Dreadnought ferrying Truth jumps into Earth high orbit, where the final space battle continues to rage between opposing fleets over the planet.

At some point between November 15 and 16,[Note 6] while John-117 was still hunting the Prophet of Truth, the UNSC already lost their garrison on Mars at the hands of the Fleet of Furious Redemption following the Battle of Mare Erythraeum,[5] which led to a dramatic increase in Covenant force deployments on Earth as the Covenant began to concentrate more of their forces on the planet, worsening the siege.[23] Despite the dramatic increase in Covenant deployments, the works of Colonel James Ackerson in the Battle of Mare Erythraeum helped buy UNSC ground forces on Earth precious time.[54] By this point, the UNSC would be hardly faced with impossible odds with no hope in sight against the full might of Covenant forces on Earth.[16]

Shortly after the loss of Mars, Covenant forces also invaded the city of Cleveland on Earth without intending to destroy it or kill civilians, unlike other cities, looking for a supposed Forerunner artifact known as the "Key of Osanalan" as told by a wounded and Covenant-tortured Colonel James Ackerson, who was captured aboard Lepidus's vessel, the Triumphant Declaration, and that was a necessary component for the firing sequence of the Halo Array. Additionally, his plan would help the population to escape the city and stall the Covenant assault on Earth and prevent the planet's fall to the Covenant like Reach.[5] During the battle, many civilians were captured and interrogated at Jacobs Field in Old Cleveland for the Key of Osanalan,[5] but later evacuated following a surprise attack from a ODST team that suddenly killed most of the Covenant forces.[55]

Arriving in a large chamber aboard the keyship Anodyne Spirit with the Prophet of Truth and a pack of Jiralhanae soldiers and honor guardmens being present, John-117 attempted to kill the Prophet remotely via a Vostu-pattern carbine, as soon as the Spartan was then attacked by a Kig-Yar Sniper and the Prophet escaped, forcing John-117 to confront and engage a number of Jiralhanae warriors. While the Spartan was believed to be dead, the Prophet of Truth orders the crew of the Forerunner Dreadnought to jump further in-system and finally arrived at Earth in high orbit on November 17, spearheading the final contingent of Truth's forces as the final space battle is still raging and the ship was then surrounded by the massive space engagement.[15][16] During which, John-117, emerged once again, broadcast to the UNSC, confirming his presence and his information regarding his situation.[16]

At the outcome of space engagements, almost the entire UNSC Home Fleet, hence many entire smaller fleets, had been utterly overrun by the outnumbering and outgunning Covenant naval forces, though it was likely that most of the overwhelming Covenant fleet, mostly the capital ships, was in return destroyed by the UNSC defenders, mainly due to Earth's formidable and fierce defense and Hood's brilliant leadership, especially thanks to multiple defending "Super" MAC-equipped orbital defense platforms,[8] throughout the Battle for Earth.[3] After demolishing most of Earth defenses, the recently-victorious Covenant fleet then lead a colossal bombardment on Earth, causing extreme terrestrial casualties and damaging much of the surface of the planet.[3] The Cairo Station survived the final space battle relatively intact, albeit left damaged.[15]

Concept art of John-117's descent to Earth at the start of Halo 3.
John-117 and the Dreadnought entering Earth's atmosphere before crashing on East Africa.

James' civilian brother, Ruwan Ackerson who was aware of what the Covenant are looking for during the Covenant interrogation at Cleveland, along with Myras Tyla, were both brought to a secret UNSC forces to meet Sergeant Twyker in attempt to repel the Covenant forces in Cleveland.[5][55] Ruwan was injected with Tykos 30, an organic tracking device, as Tyla and the remaining civilians were evacuated. He was then taken to Chagrin Falls, where a Jiralhanae Chieftain demanded that Ackerson relinquish the Key of Osanalan and an army of Jiralhanae surrounded him. However, Ruwan told them he was the Key, which confused the Covenant and brought him aboard an orbiting Ket-pattern battlecruiser, the Harbinger of Piety, before the Minister of Inquisition. There, the Minister vows to spare Earth from the Covenant occupation in exchange for knowledge of the apparent "key". Aboard the Forerunner Dreadnought, John-117, unable to assassinate the Prophet of Truth and take control of the Forerunner Dreadnought's trajectory, was informed that the Harbinger of Piety that was holding the "key" is to be destroyed. Since the ship was near the keyship, the Spartan was ordered by Twyker to find a way off the Forerunner Dreadnought to avoid being caught in the impending destruction of the cruiser. The Master Chief was then ordered to find a way to return to Earth quickly as the Forerunner Dreadnought began to enter Earth's atmosphere.[16] While the Minister was still interrogating Ruwan, the Nassau Station proceeded to remotely shoot at the Harbinger of Piety with a single shot from its MAC gun, destroying instantly the cruiser and killing everyone aboard, including the Minister of Inquisition and Ruwan Ackerson. Though, Twyker's worries was proven ill-founded due to Forerunner Dreadnought remaining unharmed following the Harbinger of Piety's destruction.[16]

After that a furious Lepidus was aware of the loss of Harbinger of Piety and the Key of Osalanan was in fact turned out to be a hoax perpetrated by Colonel James Ackerson while openly mocking the Covenant for their arrogance, the Jiralhanae shipmaster decapitated the colonel aboard the Triumphant Declaration over Mars. Ultimately, the attack on Cleveland was repelled due to James's act of self-sacrifice, and that of Ruwan.[16] Though the Martian valiant defense forces were crushed during the Battle of Mars, they are credited for delaying Covenant forces from pressing their siege on Earth.[56] Shortly after the Covenant worldwide bombardment, the Earth human population was swiftly reduced to only 200 million individuals, initially around 10 billion prior the Covenant assault with heavy casualties and a major evacuation effort and the sudden change after Truth's arrival.[4][50][57] The refugees of Cleveland, including Tyla, were evacuated to a relief camp in Akron.[16]

Immediately after the Type-27 Mantis deployments has been cleaned, the UNSC frigates initiates an attack on the Forerunner Dreadnought.

Battle for the Portal

Main article: Battle of Kenya

"Marines, the Prophet of Truth doesn't know it yet, but he's about to get kicked right off his throne. You will take our city back. And drive our enemy into the grave they've been so happily digging. One final effort is all that remains."
Fleet Admiral Terrence Hood

As the Dreadnought entered Earth's atmosphere, John-117 left the ship by leaping off during re-entry and crashing into the East-African jungle.[58] By this time most of Truth's remaining forces arrived to the now-uncovered Ark portal at Voi and had set up heavy AA batteries and other defenses near Voi and in the surrounding area to protect their work at the Portal.[3][2] During Spartan-117's re-entry, a pair of ODSTs used a laser designator during an operation in Sector Six (near the Pakistan-Afghanistan border) to track the Spartan's fall.[11] The data made it easier for Sergeant Johnson and Thel 'Vadam to locate the Spartan. After making their way through the jungle, they were extracted by a dropship, despite Covenant resistance, and taken to Crow's Nest.[58] The Covenant tracked them back to the base, however, and launched an attack.[3]

Commander Keyes proposed to destroy the Covenant anti-air defenses at Voi, allowing low flying frigates to strike the Forerunner Dreadnought now landed on the Portal. Fleet Admiral Terrence Hood had only a few frigates left, but was willing to commit to the risky plan with John-117's recovery.[3]

Just before the UNSC offensive began, the Prophet of Truth hijacked Crow's Nest operations center monitors, broadcasting a message to the base, promising the reduction of Earth to glass by the Covenant, and then the Covenant attacked Crow's Nest. Miranda Keyes evacuated and destroyed the base with a bomb before it could be occupied. John-117 barely managed to escape the destruction of the facility but met up with Gunnery Sergeant Reynolds and set out in Warthogs on Tsavo Highway to head for Voi, as did scattered UNSC forces, engaging Covenant heavy vehicles along the way.[3][59]

At Voi, the UNSC broke through Covenant defenses, as John-117 and Thel 'Vadam disabled the last Covenant AA battery. With the path to the Portal cleared, Fleet Admiral Hood ordered at least seven frigates and multiple Longswords to attack the Forerunner Dreadnought. Despite MAC fire, the enemy ship remained intact and was able to activate the Portal. The Dreadnought and the surrounding Covenant ships departed Earth through the resulting Slipspace portal.[24] Covenant battlenet cohesion broke following Truth's departure, allowing UNSC forces in the southwest URNA to begin a major counteroffensive as part of their ongoing campaign.[2]

Master Chief and the Arbiter witness the arrival of a battlecruiser, but infested by the Flood.

Flood on Earth

Main article: Outbreak on Earth

"Quickly! Let us find their ship. Make short work of this abomination!"
— Thel 'Vadam

While the battle for Earth raged, the Fleet of Retribution had been attempting to maintain a quarantine of the Flood-infested High Charity and Installation 05. The Flood-controlled Indulgence of Conviction escaped and arrived at Earth as the Prophet of Truth departed through the Portal. The ship crashed in Voi and began infesting the area. John-117 and Thel 'Vadam quickly made for the crash site intending to overload the ship's reactor. The explosion would destroy the city but would hopefully stop the spreading infestation as well.[6]

Concept art of ODSTs preparing to fight the Flood in Voi, in the mission Floodgate.
To prevent the sudden loss of Earth to the alien infestation, UNSC forces engage the Flood before being reinforced by the Sangheili forces.

A battle group of Sangheili ships, led by Fleet Master Rtas 'Vadum aboard the assault carrier Shadow of Intent, arrived in pursuit of the Flood. The Sangheili believed Cortana was aboard the Flood ship; Rtas 'Vadum could give his own troops and the UNSC only a little time to recover the AI before Voi and the surrounding area were cleansed by glassing. John-117 found the small storage device containing the AI; he entrusted to 343 Guilty Spark for repairs and they were extracted by Phantom to Shadow of Intent.[6]

Thel 'Vadam convinced Rtas 'Vadum to exercise restraint when glassing. Thus, only an area of Africa was glassed instead of a much wider area.[6]

Shortly after the initial skirmishes with the Flood, the Flood-infested High Charity jumped out of slipspace further out in the Sol system. Shortly after discovering the presence of the Portal at Voi, the Gravemind conducted an arcane bridging maneuver allowing it to transport the former holy city to the Ark from the vicinity of Mars rather than physically accessing the portal on Earth; the human homeworld thus escaped further Flood contamination.[60]

The Fleet of Retribution's battle group and the UNSC Battle Group Victory depart from Earth through the Portal at Voi as the Fleet Admiral Terrence Hood remains on the planet from an expected full-scale Flood invasion.
The Fleet of Retribution leaves through the Portal while Fleet Admiral Hood stays on Earth via Pelican.

Dealing with the Flood

Terrence Hood: "And you, Shipmaster, just glassed half a continent! Maybe the Flood isn't all I should be worried about."
Rtas 'Vadum: "One single Flood spore can destroy a species. Were it not for the Arbiter's counsel, I would have glassed your entire planet!"
— Admiral Terrence Hood and Rtas 'Vadum, after the Flood infection of Voi.

Admiral Hood and Commander Keyes joined John-117, Thel 'Vadam, and Rtas 'Vadum aboard Shadow of Intent where 343 Guilty Spark repaired Cortana's damaged storage device. The device contained only a message from the AI; it warned them that the Flood-infested High Charity was en route to Earth, but that beyond the Portal there was a solution to the Flood without firing the Halo Array.[6]

Admiral Hood was determined to make his stand against the Flood on Earth. The Sangheili believed this to be foolish; there was little hope Earth could withstand a Flood spore, never mind a full Flood invasion, and they decided to place faith in Cortana and journey beyond the Portal. John-117 and Keyes convinced a weary Hood to allow them, and a UNSC task force to accompany the Sangheili.[6]

The final stand Hood expected never came; the next day, High Charity and the Flood arrived in the Sol system, but instead performed a Slipspace jump from Mars orbit to Installation 00, an action that spared Earth from a second contamination.[61] It was at the massive installation that the Flood and the remnants of the Covenant were ultimately defeated by the UNSC and Sangheili three weeks later, bringing an end to the war that nearly extinguished the human race.

Covenant remnants

Main article: URNA Southwest Campaign

On November 18, Jiralhanae forces spotted the UNSC Crassus and its escorts at sea and engaged it using a mixture of dropships and war-sleds. While initially successful, the boarding stalled due to the ship's hallways being smaller than their bodies. Lacking any progress, the Jiralhanae destroyed the flight tower and left, leaving the carrier afloat.[25]

With the majority of Truth's forces now bound for the Ark, some of the remaining Covenant forces on Earth fortified themselves in Arizona, URNA. On December 3, Admiral Harper of the Fifth Fleet initiated Operation: MARSH FLASH, which eradicated clusters of Jiralhanae leadership attempting to activate an artifact here. The UNSC was then finally able to repel or wipe out the remaining Covanant invader forces on the planet and the system, effectively bringing an end to the invasion. Despite suffering enormous military and civilian losses, the UNSC retained control of Earth.[46] Marines involved in mopping up Jiralhanae holdouts employed the "Rex" VISR system.[62]

Aftermath

"Before 2552, there was no way anything like that could happen on Earth. On one of those distant planets in the outer colonies, maybe. But an attack on Earth? Couldn't happen. Until it did. It's called glassing. Covenant warships rain plasma down on a planet until everything and everyone on the surface melts. Usually, it's complete world destruction. Earth only got a taste. The prolonged orbital bombardment destroyed East Africa, killing millions before it ended. None of us were safe anymore."
Benjamin Giraud[63]

Battle of Installation 00

Main article: Battle of Installation 00
Help.png This section needs expansion. You can help Halopedia by expanding it.

Rebuilding and Rebirth

The aftermath of the Battle for Earth.
Main articles: Hillside Memorial, Project Rebirth

On March 3, 2553, a special ceremony on a hill over looking the Portal at Voi was held to honor the end of the war and those who had fallen.[64]

The rebuilding of Earth's infrastructure had begun in earnest as early as January 2553 in Sydney.[65] Project Rebirth, an organized effort to rebuild also took place in Aranuka[46] and Mombasa[66] took place at some point, with works in Aranuka being done by 2558.[46]

Engagements

The battle of Earth had numerous engagements across the planet. Kenya, Cleveland, Havana, and the Southewestern URNA were battlefields. Fighting also took place at Sydney,[44] Cairo, Diego Garcia,[22] Aranuka,[46] the Yucatán Peninsula,[49] Mount Erebus,[9] and Berkeley.[37]

Luna, Earth's moon was also attacked.[67]

Timeline

Main article: Timeline of the Battle for Earth

Participants

Main article: Participants in the Battle for Earth

Due to the prominence of Earth, and what had transpired prior to the battle, Earth possessed numerous UNSC assets. They clashed with several waves of Covenant forces.

Production notes

Many fans, as well as Halopedia, used to regard the Battle of Earth as two separate battles. Namely, the "First" was believed to comprise the events of Halo 2 and the "Second" was thought to cover the events of John-117's return at the beginning of Halo 3. Later sources have established that Truth's reinforcements arrived just one day after Regret fled, indicating that the "two" battles were one and the same. However, the Halo Encyclopedia: The Definitive Guide to the Halo Universe (even the 2011 revised edition) lists them as two separate battles; this is one of several elements of the Encyclopedia that is seemingly lifted from this wiki.

Gallery

List of appearances

Notes

  1. ^ a b While no official date has been given to the end of the Battle for Earth, the currently last known engagement during the battle, the Operation: MARSH FLASH in Arizona, took place on December 3, although it's still possible that other engagements on some other countries or continents was still occuring after the URNA Southwest Campaign ended.
  2. ^ The war was definitely concluded on December 11, 2552 when the Prophet of Truth was killed. However, an official cessation of hostilities did not come until March 3, 2553.
  3. ^ While not all of humanity believes itself to be subject to the UEG, the UEG claims authority over all of humanity.
  4. ^ This is derived from numerous pieces of information from within the Axon Clips including: Chapter 12 which mentions Kamal taking a flight back to the west coast; Chapter 9 where Sophia mentions that one of the people she is talking to isn't a Berkeley police officer and Kamal having to take a packbus to Reno, Nevada as his first stop; Chapter 10 where Kamal mentions waiting for said bus outside of Oakland.
  5. ^ The Sangheili vessel carrying the Arbiter and the survivors of In Amber Clad arrived at Earth at least two days before Truth's Keyship, despite the latter leaving Delta Halo's orbit well ahead of the former. While this may appear strange given that Forerunner slipspace travel can vastly outpace that of the Covenant, the apparent discrepancy is explained by the Keyship exiting slipspace in the outer edges of the Sol system on November 8 and not landing on Earth until November 17. The reason behind this delay was that the Covenant soldiers inside the Keyship focused on killing John instead of proceeding, as they feared he would kill the Prophet of Truth.
  6. ^ Halo: Uprising indicates that John-117 and Ruwan's actions was both concurrent. While Halo 2: Anniversary and Halo 3 show that Kenya, which was aimed by the Forerunner Dreadnought, was still in night at the time that the ship jumped into Earth and then landed on the Portal at Voi in November 17 in the morning on the African continent, the Battle of Cleveland in Halo: Uprising seemingly took place on the very early morning, if not evening, on the North American continent and still ongoing even after the sunrise on the Cleveland city, which would be likely and realistic that the battle took place at least one day before November 17, although the URNA is oddly still in daylight in the comic when the Forerunner Dreadnought arrived at Earth.

Sources

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  3. ^ a b c d e f g h i j k l m Halo 3, campaign level Crow's Nest
  4. ^ a b Halo 3, Bestiarum
  5. ^ a b c d e f g h i Halo: Uprising, issue 1
  6. ^ a b c d e f g h i j k l m n Halo 3, campaign level Floodgate
  7. ^ a b Halo Infinite, Targets: Thav 'Sebarim
  8. ^ a b Halo 2, campaign level The Armory
  9. ^ a b c d e f g h i j Halo: Ghosts of Onyx, page 204-205
  10. ^ a b c d e f g h i j k l Halo 2, campaign level Cairo Station
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