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{{Status|Canon}}
{{Cleanup}}
{{Battle infobox
{{Ratings}}
|prev=
{{Era|H2|H3|GOO|UP}}
|conc=[[Human-Covenant War]]
{{Template:Infobox Military Conflicts
|next=[[Sangheili-Jiralhanae war]]
|previous=
|image=[[File:H2A - HighCharityBattle Concept.png|350px]]
|conc=Human-Covenant War
|conflict=
|next=
|date=
|name=Covenant Civil War
*[[2552#November|November 3, 2552]]–[[2552#December|December 11, 2552]]{{Ref/Note|The massacre of the Sangheili on Earth on October 20, 2552 (witnessed in ''Halo 3: ODST'') is regarded as an isolated incident leading up to the Schism, whereas the conflict at large is considered to have begun with the Sangheili's banishment from the Honor Guard and the subsequent outbreak of all-out hostilities within High Charity and its fleets on November 2.}}
|image=[[Image:H3 E3 Orbital Battle.jpg|300px]]
**Continues as the [[Sangheili-Jiralhanae war]]<ref name="The Return">'''[[Halo: Evolutions - Essential Tales of the Halo Universe]]''' "[[The Return]]" - '' "It was a terrible war. The Prophets provided the Brutes with powerful new weapons, hoping that they would in turn defend their Prophets against our wrath. But when the Prophets went into hiding, the lack of leadership allowed the Brutes to return to their savage nature and they soon began to fight against each other. This lack of solidarity made them much easier prey. Some of my fellow commanders continue that fight even now"''</ref>
|begin=October [[2552]]
|place=[[Orion Arm]], [[Milky Way|Milky Way Galaxy]]
|end=March [[2553]]
|result='''Sangheili victory'''
|place=[[Milky Way|Milky Way Galaxy]]
*Dissolution of the [[Covenant]]
|Cause=Genocide
*[[San'Shyuum]] reduced to an [[Extinction#Near-extinctions (Endangered species)|endangered species]]
|result=Covenant Separatist victory <ref>''[[Halo 3]]'', level [[The Covenant (Level)|The Covenant]]''</ref>
*Ongoing conflict between the [[Sangheili]] and the [[Jiralhanae]]
|side1=[[Covenant Loyalists]]
|side1=
|side2=[[Covenant Separatists]] and [[United Nations Space Command|UNSC]]
*{{Icon|Covenant FB}} '''[[Covenant]]'''
|commanders1=*[[High Prophet of Truth]]†
|side2=
*[[High Prophet of Mercy]]†
*{{Icon|Covenant FB}} '''[[Covenant separatists]]'''
*[[High Prophet of Regret]]†
|commanders1=
*[[Jiralhanae Chieftain|Chieftain of the Jiralhanae]] [[Tartarus]]†
[[Prophet of Truth|High Prophet of Truth]]† <br>
*[[Lepidus|Shipmaster Lepidus]]
[[Prophet of Mercy|High Prophet of Mercy]]† <br>
|commanders2= *[[Thel 'Vadamee]]
[[Prophet of Exquisite Devotion]]† <br>
*[[Shipmaster]] [[Rtas 'Vadum]]
[[Chieftain of the Jiralhanae|Chieftain]] [[Tartarus]]† <br>
*[[Fleet Master]] [[Voro Nar 'Mantakree]]†
[[Jiralhanae Chieftain|Chieftain]] [[Gargantum]] <br>
*[[Imperial Admiral]] [[Xytan 'Jar Wattinree]]
[[Jiralhanae Chieftain|Chieftain]] [[Avitus]]
*[[Fleet Admiral|FADM]] [[Sir Terrence Hood]]
[[Jiralhanae Captain|Captain]] [[Melchus]] <br>
*[[Commander|CMDR]] [[Miranda Keyes]]
|commanders2=
*[[Spartan-117|Master Chief John-117]]
[[Arbiter]] [[Thel 'Vadam]] <br>
|forces1=*[[Covenant Loyalists|Covenant Loyalist]] [[Covenant Army|Army]]
[[Shipmaster]] [[Rtas 'Vadum]] <br>
*[[Prophets]]
[[Unidentified Shipmaster (Righteous Vigilance)|Unidentified Sangheili Shipmaster]]{{Ref/Reuse|The Return}} <br>
*[[Brutes]]
[[Fleet Master]] [[Voro Nar 'Mantakree]]† <br>
*[[Jackals]]
[[Imperial Admiral]] [[Xytan 'Jar Wattinree]]† <br>
*[[Grunts]]
[[Blademaster]] [[Vul 'Soran]]<br>
*[[Drones]]
[[Fleetmaster]] [[Rojka 'Kasaan]]<br>
*[[Hunters]]
|forces1=
*[[Covenant Navy|Covenant Loyalist Navy]]
*[[Covenant military]]
**[[Truth's Fleet]]
**[[Truth's fleet|Prophet of Truth's fleet]]
|forces2=*[[Covenant Separatist]] [[Covenant Army|Army]]
**Jiralhanae-led [[High Charity defense fleet]]
*[[Elites]]
**[[Fleet of Furious Redemption]]
*[[Grunts]]
*[[San'Shyuum]]
*[[Hunters]]
*[[Jiralhanae]]
*[[Humans]]
*[[Yanme'e]]
*[[Covenant Navy|Covenant Separatist Navy]]
*[[Kig-Yar]]
**[[Fleet of Retribution]]
*Few [[Unggoy]]
**[[UNSC Defense Force]] (3 UNSC Frigates left)
*Few [[Mgalekgolo]]
|casual1=*[[Prophet of Truth]]
*[[Huragok]] {{C|unwillingly}}
*[[Prophet of Mercy]]
|forces2=
*[[Prophet of Regret]]
*[[Fleet of Retribution]]
*[[Tartarus]]†
*[[Fleet of Righteous Vigilance]]
*Large amounts of [[Jiralhanae]], [[Mgalekgolo]], [[Unggoy]], [[Kig-yar]] and [[Yanme'e]] forces possibly all
*[[Fleet of Recalcitrant Ire]]
|casual2=*[[Fleet Master|Fleetmaster]] [[Voro Nar 'Mantakree]]
*[[Joyous Exultation Covenant]]
*[[Commander|CMDR]] [[Miranda Keyes]]
**[[Combined Fleet of Righteous Purpose]]
*[[Sgt. Johnson]]†
**Sangheili-led [[Second Fleet of Homogeneous Clarity]]{{Ref/Book|Ghosts of Onyx|Chapter=27}}
*Large amounts of [[Sangheili]], [[Human]], [[Unggoy]] and [[Mgalekgolo]] forces
*[[Sangheili]]
}}
*Most of the [[Unggoy]]
*Most of the [[Mgalekgolo]]
*[[Huragok]]
|casual1=
*Most San'Shyuum {{C|reduced to an [[Extinction#Near-extinctions (Endangered species)|endangered species]]}}
**[[Prophet of Mercy|High Prophet of Mercy]]
**[[Prophet of Truth|High Prophet of Truth]]
*Many Jiralhanae
**[[Chieftain of the Jiralhanae]] [[Tartarus]]
*Many Yanme'e
*Many Kig-Yar
*Some Unggoy
*Few Mgalekgolo
|casual2=
*Many Sangheili
**[[Fleet Master]] [[Voro Nar 'Mantakree]]
**[[Imperial Admiral]] [[Xytan 'Jar Wattinree]]
*Some Unggoy
*Some Mgalekgolo}}
{{Quote|By the Prophets... what have these Brutes done? They have shed our brothers' blood... and for that, they must die!|[[Sangheili]] on [[Installation 05]].{{Ref/Level|Id=Uprising|H2|Uprising}}}}


The '''Great Schism''',{{Ref/Book|Id=GoO|GoO|Page=240}} also known as the '''Covenant Schism''',{{Ref/Book|Id=GoO245|GoO|Page=245}} was a major civil war between the forces loyal to the [[Covenant]] (led by the [[San'Shyuum]] and the [[Jiralhanae]]) against the [[Covenant separatists]] (the [[Sangheili]] and their followers), which split apart on [[2552#November|November 3, 2552]]. The [[High Prophet of Truth]] ordered the extermination of the entire Sangheili species,{{Ref/Reuse|TEVG}}{{Ref/Level|H2|Quarantine Zone}}{{Ref/Novel|GoO|Page=208}} forcing them out of the Covenant.{{Ref/Reuse|Elites}} Battles during the Schism took place all throughout Covenant space, most prominently on [[High Charity]], the heart of the alien empire. The [[Flood]] additionally played a tertiary role, when they took over the holy city in an effort to assimilate the other warring factions. The deciding battles were fought between the Sangheili [[Fleet of Retribution]] allied with the [[United Nations Space Command|UNSC]] against the [[High Prophet of Truth]] and his remnants of the Covenant on the [[Installation 00|Ark]]. The Schism marked both the end of the Covenant and the partition of its client species for a thousand years.{{Ref/Reuse|GoO245}} For the UNSC, it served as a major turning point that led to the [[Battle of Installation 00|end of the war]] after their [[Fall of Reach|disastrous defeat on Reach]].
The '''Great Schism''', is a war between the two factions that split apart in [[2552|October 2552]]. During the Covenant Civil War, three major factions fought for victory: [[Humans]] and their [[Covenant Separatists|Separatist]] allies, [[Covenant Loyalists]] led by the [[San 'Shyuum]] and the [[Jiralhanae]],  and Gravemind and the [[Flood]], which took over the Covenant [[List of Starships|Holy City]] of [[High Charity]] in an effort to assimilate the other warring factions.


The conflict went down in Sangheili history as the '''Great Betrayal''',<ref>'''Halo: Evolutions''', ''The Return'', ''page 247''</ref> its deep wounds continuing to stir animosity between their kind and the Jiralhanae for years to come.{{Ref/Reuse|The Return}}
The Term "Great Schism" is taken from [http://en.wikipedia.org/wiki/Schism_%28religion%29|human religious debates] over orthodoxy and power, most notably the [http://en.wikipedia.org/wiki/East-West_Schism East-West Schism], the [http://en.wikipedia.org/wiki/Western_Schism Western Schism], and the [http://en.wikipedia.org/wiki/Old_Believers Old Believers Schism]. The [http://en.wikipedia.org/wiki/Sunni-Shia_relations Sunni-Shia split] is also often called a Schism.


==Background==
==Conflict Erupts==
{{Quote|no=two|1=Thel 'Vadamee|q1=We are strong, Kig-Yar. That is why we sit at the right hand of the Prophets.|2=Reth|q2=One day that shall pass.|3=Conversation between [[Reth]] and [[Thel 'Vadam]]ee in [[2535]]<ref>'''[[Halo: The Cole Protocol]]''', ''page 229''</ref>}}
After the [[Prophet of Regret]] was killed by the [[Master Chief]], the two remaining [[Prophets]], most notably the [[High Prophet of Truth]], reorganized [[Covenant]] society, replacing the [[Elites (Sangheili)|Elites]] with the [[Jiralhanae|Brutes]] as the Prophets' [[Honor Guard of the Covenant|protectors]]. The Elites viewed this as a violation of the principle that the Covenant had been founded upon and threatened to resign from the [[High Council]]. They also argued that if Truth had not withdrawn the [[Phantom]]s that had been en route to [[Prophet_of_Regret|Regret's]] location, the Prophet's death would have been prevented and the [[Demon]] would have been killed instead of the Prophet.  
[[File:H2A Terminals - Sangheili surrender.png|250px|thumb|left|The Sangheili threatened San'Shyuum power,{{Ref/Reuse|challenger}} while the Jiralhanae threatened Sangheili power.{{Ref/Reuse|Conversations}}]]
[[Image:War.jpg|thumb|left|250px|A Loyalist and Separatist space battle over High Charity.]]
For centuries over the course of the [[history of the Covenant]], various high ranking [[Sangheili]] with great influence would use their power to ask questions, eventually coming close to discovering the truth about the [[Forerunner]]s.{{Ref/Reuse|challenger}} Discovering such a truth would falsify the [[Covenant religion]] and shatter the empire along with its power structure. As such, the [[San'Shyuum]] [[High Prophet]]s perceived these influential Sangheili as a threat to their authority, and would send them on suicidal missions decorated under the honorary guise of [[Arbiter]]s to discretely remove their threatening presence.{{Ref/Game|Id=challenger|Halo 2: Anniversary|Part=[[Terminal (Halo 2: Anniversary)|Terminal 11]]|Quote=In some cases, that influence was already being used to question the decisions of your Hierarchs. In fact, that very questioning often gave rise to the charges of heresy that so neatly removed the challenger from the Hierarchs' concern.}}
However, Truth further demoted the Elites by giving command of their [[Covenant Fleet]]s to the Brutes. Once enough Brutes were in place, Truth instigated the war by secretly ordering the assassination of many [[Councilors|ruling]] Elites. This was disguised as a Brute insurrection against the Covenant to the [[Sangheili|Elites]], the [[Hunters (Lekgolo)|Hunters]] and most [[Unggoy|Grunts]]. Loyalist factions were led to believe it was an Elite revolt. After the killing of the Elite Council members, war broke out on [[High Charity]], the two sides polarizing quickly. However, this was at first a debate over orthodoxy and leadership. The true split occurred when the Elites learned the truth about the [[Halos]] and the [[The Great Journey|Great Journey]]. Their disillusionment changed their goal from reforming the purity of the Covenant to actively fighting against it.  


With this history of troublesome influential Sangheili well documented among the High Prophets, the threat the Sangheili posed was made even more apparent during the [[Human-Covenant War]] in [[2552]], when [[Sesa 'Refumee's heretic faction]] spread information about the [[Covenant religion#Great Journey|Great Journey]] being false.{{Ref/Game|Halo 2|Quote=Our Prophets are false! Open your eyes, my brothers! They would use the faith of our forefathers to bring ruin to us all! The Great Journey is a-}} Intending to prevent the Covenant from falling apart and losing power, the [[Prophet of Truth|High Prophet of Truth]] secretly made plans to eject the entire Sangheili species from the hegemony, viewing them as untrustworthy and doubting their reliability and loyalty. As the war had waged on, some Sangheili questioned the need to exterminate [[humanity]] instead of welcoming them into the Covenant, given humanity's strength as a tenacious species and occasional displays of honor.{{Ref/Book|Cole Protocol|Page=247}}{{Ref/Game|Halo 2|Part=[[Conversations from the Universe]]: [[Conversations from the Universe#Elite Conversation|Elite Conversation]]}} This changing attitude towards mankind who were deemed [[heretic]]al along with the faliure to [[Battle of Installation 04|safeguard]] a holy [[Alpha Halo|"Sacred Ring"]], further perpetuated San'Shyuum distrust toward the Sangheili.
The split was not cleanly divided by either race or faction. [[Covenant Loyalists|Loyalists]] followed the Prophets and included Brutes, Jackals, Drones, some Grunts and some Hunters. [[Covenant Separatists|Separatists]] included Elites, with most Hunters and many Grunts also breaking away initially. The Great Schism seemed to be more associated with intellect. The Elites' reasoning, logic and good intentions allowed them to see through the abuse of religious authority enforced by the Prophets. The less intelligent and cowardly Grunts' allegiance, however, eventually turned and remained with the Covenant, though there is another possible explanation for the Grunts' shift in allegiance.  


The High Prophet of Truth plotted to eventually replace the Sangheili with the [[Jiralhanae]], as he saw the latter as more willing and unquestioning pawns. Ever since the Jiralhanae's integration in [[2492]], their dominating physicality and aggressive behavior was perceived as a threat by the Sangheili to their superior status in the Covenant hierarchy.<ref name="Conversations">[[Conversations from the Universe]]: [[Conversations from the Universe#Grunt Conversation|Grunt Conversation]] "And you have ears, you've heard the disrespect the Jiralhanae show the Sangheili. They hate each other. The Sangheili have lived too long under the shelter of the Covenant as the strongest of us. The Jiralhanae come stomping along and suddenly it's not so simple as it was."</ref> In turn, the Sangheili treated the Jiralhanae poorly and oppressed them, to keep them in line.<ref>[http://www.gamespot.com/articles/halo-wars-2-new-character-images-and-details-revea/1100-6442098/?ftag=GSS-05-10aaa0b '''Gamestop''': ''Halo Wars 2: New Character Images and Details Revealed''] - "Decimus still harbors some resentment against the Elites under Atriox's banner due to how Elites treated the Brutes during the time of the Covenant"</ref> Competition for dominance in the Covenant military and hatred festered between the two species,{{Ref/Reuse|Conversations}} though the Sangheili maintained their authority and power as a founding race.<ref>[[Bestiarum]] "The Sangheili are, simply put, technological and societal equals of the Prophets yet, for a significant period, found themselves as the dominant military muscle for the entire Covenant structure"</ref> Feeding off of their societal rivalry, Truth knew that the Jiralhanae would be more than happy to replace the Sangheili as the Covenant's military leaders. He had appointed [[Tartarus]], a loyal Jiralhanae, to the position of [[Chieftain of the Jiralhanae]] who would help him execute his plan. Truth kept these schemes to himself and waited until the time was right to implement them.
It's possible that the only Grunts who actually remained loyal to the Prophets were the most devout followers of the Covenant religion (ex. Deacons). This might also suggest that the Grunts' "new found courage" in [[Halo 3]] might have been the result of fanaticism rather than cowardice. There is some evidence to support this since there are a number of Grunts who commit acts that are anything but cowardly (ex. Kamikaze Grunts). It's also possible that the reason Separatist Grunts are never seen in Halo 3 is that shortly after the Great Schism, they returned to [[Balaho]] to lead an uprising against the Deacons and other Loyalist forces. The Separatist [[Hunters]] might have done the same on [[Te]], but it is still unknown.


===Secret preparations===
==Sangheili-Human Alliance==
After the [[High Prophet of Truth]] learned the location of the [[Earth|human homeworld]], he secretly amassed [[Truth's fleet|a fleet]] of over five hundred warships, commanded entirely by Jiralhanae, at the Covenant's command-and-control station ''[[Unyielding Hierophant]]''.<ref>'''[[Halo: First Strike]]''', ''page 297''</ref> In [[2552#September|September 2552]], this station and the fleet [[Operation: FIRST STRIKE|were destroyed]] by [[SPARTAN-II program|Spartan-II]] [[Blue Team]] who learned of its purpose shortly before the invasion could commence.<ref>'''Halo: First Strike''', ''page 407''</ref> This put a temporary halt to Truth's plans to replace the Sangheili with the Jiralhanae.<ref name="oct20">'''[[Halo Waypoint]]''', ''"Ten Twenty" history article''</ref>
The shaky-to-steady alliance between the Separatists and their former foes, the [[Humans]], was forged entirely out of necessity. The UNSC forces were small, on the defensive, and they had two common enemies that wished for their extinction: the Covenant and the Flood. The alliance of circumstance was forged in the control room of [[Delta Halo]], when Johnson and the Arbiter were coerced to unite in order to prevent Tartarus activating the Halo, which would have killed everything (Brutes included, though the Brutes believed that it was only the Great Journey).<ref>''[[Halo 2]]'', [[The Great Journey (level)]] Final Cutscene</ref>. However, the Arbiter persuaded the rest of the Sangheili to join the Humans. While the two factions experience some friction, they learn to work with one another for their mutual survival. During the events of ''Halo 3'', the [[Elites]] fight alongside [[Humans]] in battle. The Elites decided to save the humans from destruction.


At some point, the Prophet of Truth also commissioned the creation of [[Drekar]] ships to be used by the Jiralhanae against the Sangheili.{{Ref/Book|Id=Enc22|Enc22|Page=461}}
The devastated [[UNSC]] [[Fleet]] in Earth's space were glad to accept the help of the superior [[Separatist]] Warships. The [[Elites]]' understanding of enemy equipment and [[Covenant]]'s combat tactics proved invaluable in the [[Battle of Installation 00]]. Recurrently the heroes of battle, the Arbiter and [[Master Chief]] fought alongside one another many times in the desperate and long conflict. The Arbiter's presence at memorial services for the [[Master Chief]] indicated that in the wake of victory, [[Separatist]] and [[Human]] forces remained friendly to one another.  As they both had made tremendous sacrifices in order to stop Truth and the Loyalist forces.  The Elites and Humans will probably continue to be allies and will benefit greatly from being allies with one another in the future.


[[File:H3ODST FamilyFeud.jpg|thumb|left|250px|[[Edward Buck]] comes across the aftermath of an early skirmish between Sangheili and Jiralhanae during the [[Battle of Mombasa]].]]
With [[Truth]] dead, [[High Charity]] destroyed, and the [[Ark]] essentially lost to the reborn [[Installation 04 (II)|Installation 04]]'s firing, it is unknown what exactly the remaining [[Loyalist]] forces did.  
A month later on October 20, the [[Prophet of Regret|High Prophet of Regret]] made a move the High Prophet of Truth did not expect. Having discovered a significant [[Forerunner]] [[Portal at Voi|artifact]] on a planet called "Erde-Tyrene" all by himself, but unaware of the fact it was humanity's homeworld known as Earth, Regret took [[Fleet of Sacred Consecration|his fleet]] of only fifteen ships and rushed to "Erde-Tyrene" to investigate it.{{Ref/Reuse|oct20}} Immediately after Truth learned of this, he sent the remnants of the fleet he had amassed, to Earth as well. Truth gave his Jiralhanae troops orders to forcibly overtake the Sangheili in command of the remaining forces on and above Earth.
According to the [[Bestiarum]] in [[Halo 3]]'s Limited Edition, the [[Grunts]] were too indecisive to continue the rebellion and the true political motivation of the [[Hunters]] if any remained a mystery. [[Ship Master]] [[Rtas 'Vadum]] stated that [[Truth]]'s Fleet was destroyed. Had any of the [[Covenant]] survived on the [[Ark]] or in the ruins of their Fleet, they were either taken by the [[Flood]] or killed when the unfinished [[Installation 04 (II)]] fired and destroyed itself and heavily damaged the Ark. At the end cutscene of ''[[Halo 3]]'', victorious Elites depart for their homeworld. With the Covenant disbanded and the [[Flood]] threat ended, each race returned home to rebuild their homeworld.


To Regret's surprise, he was invading the human homeworld, resulting in a [[Battle of Mombasa|massive battle]] forcing him to flee. When Regret retreated from Earth, his Sangheili-led ships in orbit and ground forces continued to engage the [[United Nations Space Command]] without his leadership.
== Timeline ==
=== [[2552]] ===


Moments after, the Jiralhanae forces within the fleet and on the ground discretely killed all remaining Sangheili on Earth,<ref name="odst">'''[[Halo 3: ODST]]''', campaign level ''[[Coastal Highway]]''</ref> as Truth had ordered. [[Vero 'Ahtulai]] was one among many of these Sangheili victims. They took over the Sangheili's duties to occupy the human city of [[New Mombasa]], until more Jiralhanae reinforcements sent by Truth arrived. As ''[[High Charity]]'' and the rest of the [[Covenant fleet]] were on their way to the newly discovered [[Halo Array|Halo]] [[Installation 05]], Delta Halo, the murder of these Sangheili ground forces remained secret from the rest of the Covenant.  
'''September 22:'''
*[[Installation 04]] is destroyed by [[UNSC|Human]] forces. Its [[Monitor]], [[343 Guilty Spark (Monitor)|343 Guilty Spark]], escapes to [[Threshold]]. The ''[[Fleet of Particular Justice]]'' is wiped out. The Fleet's secondary flagship, the ''[[Ascendant Justice]]'', is captured by Humans.<ref>''[[Halo: First Strike]]''</ref>
*A [[Covenant]] Artifact Retrieval team led by [[Heretic Leader|Sesa 'Refumee]] is investigating the [[Gas Mine]] of Threshold when he encounters 343 Guilty Spark. Inspired by Spark's words, 'Refumee rebelled against the [[High Prophets]] of the Covenant.
'''October 20:'''
*The [[Arbiter (character)|Supreme Commander]] of the Fleet of Particular Justice is tried before the [[High Council]] and sentenced to death.
* The [[High Prophet of Truth]] overrides the council and makes the Supreme Commander an Arbiter of the Covenant. Truth then sends him to kill Sesa 'Refumee and destroy his [[Heretic|rebellion]], which they dub "Heresy".
*[[First Battle of Earth]]. The defeated [[High Prophet of Regret]] is forced to retreat to [[Installation 05]], pursued by the ''[[UNSC In Amber Clad]]''.
*The Arbiter and a Spec Ops Commander, [[Rtas 'Vadumee]] lead a team of [[Special Ops Elites|Spec Ops]] forces to Threshold, where they kill [[Sesa 'Refumee]] and successfully crush his rebellion.
'''November:'''
*The [[Master Chief]] tracks down and kills the [[Prophet of Regret]] on Installation 05.
*''[[High Charity]]'' arrives at Installation 05. Witnessing the assassination of the Prophet of Regret, the Prophet of Truth replaces the [[Honor Guard]] [[Elites]] with [[Brutes]]. Insulted, the Elite [[Councilor]]s threaten to resign from the High Council.
*The Arbiter and Tartarus are sent to retrieve [[The Index]]. The Arbiter successfully takes the Index, but Tartarus tries to kill him and takes the Index from him, as he was secretly ordered to do so by the Prophet of Truth.
*Most of the Elite [[Councilor|Councilors]] are taken to the surface of [[Installation 05]] where they are murdered by the [[Brutes.]]
*[[Tartarus]] declares war on the [[Elites]], and the [[Battle of High Charity]] begins. Fighting between [[Elite]] and [[Brute]] forces breaks out all over the Holy City. As word spreads, fighting takes place throughout the Fleet, as [[Elite]]- and [[Brute]]-controlled ships attack one another.
*[[Flood]] invade [[High Charity]] in the middle of the battle using the [[Pelican]].
*[[Tartarus]] attempts to activate [[Installation 05|Halo]].
*[[Arbiter (Character)|The Arbiter]], with the help of [[Sergeant Johnson]] and [[Rtas 'Vadumee]], kills [[Tartarus]].
*[[Miranda Keyes]] aborts the activation of [[Installation 05|Halo]], placing the entire [[Halo Array]] on standby status.  [[343 Guilty Spark (Monitor)|343 Guilty Spark]] reveals the existence of [[The Ark]].
*The battle in and around High Charity ends with the Flood in control of the city. The [[Brute]] and [[Elite]] Fleets remaining around the city-station continue to destroy each other.
*The [[Prophet of Truth]] takes the [[Forerunner Dreadnought]] to [[Earth]], to join [[The Second Battle of Earth]]. The [[Brute]] forces there are already engaged in fighting with the [[UNSC]]. Unbeknown to the [[Prophet of Truth]], the [[Master Chief]] is on the ship, with the intention of "Finishing the Fight".
'''November 3:'''
*The UNSC [[Prowler]] ''[[Dusk]]'' witnesses the battle between Elite- and Brute-held ships above [[Delta Halo]], both fighting each other pausing only to escalate an immediate outbreak of the [[Flood]] from the ringworld and links up with [[Battlegroup Stalingrad]].
*[[Major Domo]] [[Voro 'Mantakree]] kills his [[Ship Master]], [[Tano 'Inanraree]], while he is attempting to allow the [[Flood]] to enter the ship. He then assumes command of the ship, the ''[[Incorruptible]]'', and becomes the ''de facto'' leader of the ''[[Second Fleet of Homogeneous Clarity]]''. He leads his new forces to ''[[Joyous Exultation]]'', pursued by the [[Brute]] [[Gargantum]] and his ships.
*[[Imperial Admiral]] [[Xytan 'Jar Wattinree]] plans to lure the [[Brute]] leadership to Joyous Exultation and plans an ambush for them. He deploys the newly-promoted [[Fleet Master]] [[Voro Nar 'Mantakree]] to [[Onyx]] to recover the [[Forerunner]] technologies there and prevent the UNSC forces there from claiming it themselves. A NOVA bomb captured by the Supercarrier ''[[Sublime Transcendence]]'' devastates the planet moments after Mantakree's forces leave, the survivors joining Mantakree at Onyx.<ref>''[[Halo:Ghosts of Onyx]]'', pages 244-245</ref>


Regret arrived at Delta Halo weeks before ''High Charity'' and the rest of the Covenant, and indirectly served yet another purpose for Truth plan: to scapegoat the Sangheili.{{Ref/Reuse|oct20}} With the arrival of the {{UNSCShip|In Amber Clad}} commanded by [[Commander]] [[Miranda Keyes]] on Delta Halo, the UNSC managed to [[Assassination of the Prophet of Regret|assassinate the Prophet of Regret]] in a temple on the Halo ring after they got the intel they needed, with [[Spartan-II|Spartan]] [[John-117]] carrying out this task.
===2553===
'''March 3'''
The [[Humans]] and the [[Elites]] make a memorial to commemorate those who were lost in the battle of the [[Ark]]. This memorial honors specifically Master Chief by having the number 117 engraved on it.


===The Changing of the Guard===
{{Main|Changing of the Guard}}
[[File:H2A Beamish cameo.jpg|thumb|250px|Kig-Yar and Unggoy protest on High Charity.]]
After the High Prophet of Regret was killed by the [[John-117|Demon]] on [[2552#November|November 2, 2552]], the two remaining [[Hierarchs]] reorganized Covenant society. Claiming that the Sangheili could no longer protect the Prophets due to Regret's death, the High Prophet of Truth publicly replaced the Sangheili with the Jiralhanae as the Prophets' [[Honor Guard|protectors]]. Much to their dismay, all [[Sangheili Honor Guardsman|Sangheili Honor Guardsmen]] were ordered to give away their armor and weapons to the new [[Jiralhanae Honor Guardsman|Jiralhanae Honor Guardsmen]]. The Sangheili viewed this as a violation of the principle that the Covenant had been founded upon and threatened to resign from the Covenant.<ref name="icon">'''[[Halo 2]]''', campaign level ''[[Sacred Icon]]''</ref> [[Special Operations Commander]] [[Rtas 'Vadumee]] relayed this warning from the [[Sangheili High Councilor]]s to Truth, who attempted to comfort the situation by calling it a mere "exchange of hats". Several Unggoy and Kig-Yar would join in protest against this change as well.{{Ref/Level|H2|[[Gravemind (level)]]}}


The High Prophet of Truth further demoted the Sangheili by giving command of their fleets to the Jiralhanae, including the [[Fleet of Profound Solitude]], [[Fleet of Tranquil Composure]] and [[Fleet of Inner Knowledge]].{{Ref/Reuse|HWTimeline}} Many Sangheili [[Shipmaster]]s and [[Fleetmaster]]s would be replaced with new Jiralhanae commanders. Truth allocated more loyal forces to his disposal by pardoning and releasing all Jiralhanae prisoners, while publicly framing it as a celebration for the species newly elevated status in Covenant society.<ref name="HWTimeline">'''[[Halo Wars]]''', ''[[Halo Wars Timeline Events|Timeline]]''</ref>


The Sangheili found these changes to be deeply humiliating, as founding members of the Covenant they were insulted to see their societal status quickly becoming relegated below the Jiralhanae.<ref>[http://www.gamespot.com/articles/halo-wars-2-new-character-images-and-details-revea/1100-6442098/?ftag=GSS-05-10aaa0b '''Gamestop''': ''Halo Wars 2: New Character Images and Details Revealed''] - "This arrangement was deeply unpleasant for the Shipmaster, especially since Elites were used to lording over the Brutes during the time of the Covenant..."</ref>
== Sources ==
<references/>


==War==
== Related Links ==
===Conflict erupts===
*[[Covenant]]
{{Quote|The Great Schism is upon us. The unbreakable Covenant [[Writ of Union]] has been split asunder. This is the end of the Ninth, and final, [[Ages of Reclamation|Age]].|Xytan 'Jar Wattinree{{Ref/Reuse|GoO}}}}
*[[Elites]]
[[File:H2A Terminals - Murder of the Councilors.jpg|thumb|300px|left|The massacre of the Sangheili High Councilors.]]
*[[Brutes]]
The High Prophet of Truth predicted that the High Council would elect a new Hierarch to replace Regret, and so he made his move to eliminate the [[Sangheili Councilor|Sangheili High Councilors]] to prevent another moderate Prophet from being elected.<ref>[https://www.halowaypoint.com/en-us/universe/factions/high-council '''Halo Waypoint''': ''High Council'']</ref> Once enough Jiralhanae were in place, Truth instigated a pogrom by ordering the assassination of all Sangheili Councilors.<ref name="uprising">'''Halo 2''', campaign level ''[[Uprising]]''</ref> Many Sangheili High Councilors and former Honor Guards were ordered to meet in the [[Control Room (Installation 05)|Control Room]] of [[Installation 05]] to begin preparing for the [[Covenant religion#Great Journey|Great Journey]]. However, [[Jiralhanae Captain]] [[Melchus]] arrived at the Control Room, with a large heavily armed contingent of Jiralhanae, and proceeded to massacre the Councilors and former guardsmen.<ref>'''Halo: Broken Circle''', ''pages 219-222'' (Google Play edition)</ref> All Sangheili in the room were killed except for [[G'torik 'Klemmee]] who survived a deadly fall and later escaped, the rest were smashed into bloody pieces by [[Gravity hammer (fiction)|gravity hammer]]s. Concurrently, [[Chieftain of the Jiralhanae]] [[Tartarus]] and his guards attempted to kill [[Arbiter]] [[Thel 'Vadamee]] in the [[Library]], seizing the [[Index]] and knocking him into a deep pit, as ordered by Truth. This would spark the start of the Great Schism.
*[[Prophets]]


Word of the massacred Sangheili Councilors immediately spread and was perceived as an insurrection against the Covenant to the Sangheili. The Jiralhanae and other loyalists were led to believe it was a Sangheili revolt, rejecting the Jiralhanae's newly elevated status,{{Ref/Book|Halo Envoy}} and were ordered to exterminate the entire Sangheili species and kill all of them on sight.{{Ref/Book|Id=TEVG|Halo: The Essential Visual Guide|Page=25|Quote=...when the High Prophet of Truth appointed the Brutes for his own security, proclaiming the Elites to be heretics deserving extermination.}} After the slaughter of the Councilors, war and violence broke out on High Charity, with the two sides polarizing quickly. Video messages of the various massacres were sent to all Sangheili forces,<ref>[[Halo: Evolutions]] [[The Return]] (Motion Comic) - "We were scouting for humans when the message came in. I could not comprehend what I was seeing. Our betrayal by the Prophets. The Slaughter of our leaders."</ref> resulting in the entire species learning that they had been forced out of the Covenant.{{Ref/Site|Id=Elites|URL=https://www.halowaypoint.com/en-us/universe/species/jiralhanae|Site=Halo Waypoint|Page=Universe: Jiralhanae|LocalArchive=https://web.archive.org/web/20151124211139/https://www.halowaypoint.com/en-us/universe/species/jiralhanae|Quote=The resulting conflict would be called the Great Schism, and it would divide the Covenant into two, ultimately forcing the Sangheili out.}} The ships within the [[High Charity defense fleet]] began shooting each other down while gunfire erupted aboard the interior of High Charity. At the front lines of the conflict, the species of the Covenant took distinct sides. Those who followed the High Prophets included all San'Shyuum and Jiralhanae (with a [[Zo Resken|few]] [[Piety|exceptions]]),<ref>'''Halo: Glasslands''', ''page 55''</ref><ref>'''Halo: Broken Circle'''</ref> many [[Kig-Yar]] and [[Yanme'e]], some Unggoy, and a few Mgalekgolo. The forces allied with all the Sangheili consisted of many Mgalekgolo, Unggoy and [[Huragok]].<ref>'''Halo: Evolutions''', "[[Wages of Sin]]", ''page 509''</ref>
{{Covenantwars}}
 
[[File:H2A-Brutes vs Elites.jpg|300px|thumb|Former Sangheili Honor Guards fight with the Jiralhanae on High Charity.]]
The [[Prophet of Exquisite Devotion]] who had been torturing Sangheili, discovered that the [[Zo Resken|Prophet of Clarity]] was attempting to aid them. Devotion then attempted to have Clarity executed for [[heresy|treason]]. However, a group of Sangheili led by G'torik 'Klemmee arrived and rescued the Prophet of Clarity—killing Exquisite Devotion in the process.<ref>'''Halo: Broken Circle''', ''page 242''</ref>  After the Sangheili-led and Jiralhanae-led forces fought each other in High Charity for several hours, [[Flood]] infected [[Pelican]]s eventually crashed into the holy city, spreading the parasite. Around this time, the High Prophet of Truth left the [[High Prophet of Mercy]] to die at the hands of the Flood, solidifying his place as the autocrat of the Covenant.<ref name="gravemind">'''Halo 2''', campaign level ''[[Gravemind (level)|Gravemind]]''</ref> The chaos was further intensified when Truth abandoned High Charity in the [[Anodyne Spirit|Forerunner Dreadnought]] on a journey to [[Earth]], disconnecting it from the grid, leaving the entire city in the dark without power amongst the Flood. Clarity, 'Klemmee, and the rest of their small group would later escape High Charity aboard a stolen supply ship, ''[[Journey's Sustenance]]''.<ref>'''Halo: Broken Circle''', ''page 250''</ref> High Charity fell to the Flood, leaving the Covenant without a capital and the dying San'Shyuum without a homeworld. Sangheili ships attempted to quarantine the region of space around High Charity, preventing any possibly infected ships from leaving, while also shooting down enemy Jiralhanae ships.
 
===Broadening conflict===
Conflict occurred all across Covenant space, including from within [[Covenant starship|ships]] themselves. Notably, one [[Unidentified Shipmaster (Righteous Vigilance)|Sangheili Shipmaster]] grabbed the [[Prophet of Conviction|Prophet]] aboard his ship, having barged into his cabin, and executed him before the rest of the crew. [[Chol Von]], a [[T'vaoan]] [[Shipmaster|shipmistress]], captured a [[Phantom]], killing two [[Sangheili]] in the process.<ref>'''Halo: Mortal Dictata''', ''page 73''</ref>  She renamed her [[missionary ship]] ''[[Paragon|Joyous Discovery]]'' as ''Paragon''.<ref name="md141">'''[[Halo: Mortal Dictata]]''', ''page 141''</ref>
 
At the onset of the conflict,{{Ref/Game|Id=Target03|HINF|[[High Value Target]] dossier, [[Okro 'Vagaduun]]}} the [[Bloodbrave Guardians of Suban]] on [[Suban]] were attacked by loyalist forces on the orders of the Hierarchs, with all but [[Okro 'Vagaduun|one member]] of the organization being killed in the attack.{{Ref/Book|Id=Enc22P458|Enc22|Page=458}}
 
Covenant ships in orbit above both [[Tribute]]{{Ref/Site|URL=https://www.halowaypoint.com/en-us/universe/locations/tribute|Site=Halo Waypoint|Page=Tribute}} and [[Reach]] would begin firing at one another.{{Ref/Book|Enc22|Page=43}}
 
The civil war was at first a conflict over orthodoxy and leadership, as [[Imperial Admiral]] [[Xytan 'Jar Wattinree]] summoned many Sangheili to [[Joyous Exultation]] in a plot to wipe out the Jiralhanae. However, a revelation among the Sangheili occurred when Thel 'Vadam's [[Fleet of Retribution|contingent]] discovered the truth that the Halos would kill all life in the galaxy and that the Great Journey was a lie, from both the [[Gravemind]] and [[343 Guilty Spark]]. Their disillusionment changed their goal from reforming the purity of the Covenant to actively standing against the [[Covenant religion]] the following day. Wattinree's separatist forces would be destroyed in the meantime in the accidental [[NOVA bomb]]ing of Joyous Exultation and the [[Onyx Conflict]].
 
===Sangheili-human alliance===
[[File:HLC The Great Schism.jpg|250px|thumb|left|One of the Sangheili leaders, [[Arbiter]] [[Thel 'Vadam]], duels against the Jiralhanae leader [[Tartarus]].]]
On [[Installation 05]], [[Avery Johnson|Sergeant Major Avery Johnson's]] [[Marine]]s met [[Arbiter]] [[Thel 'Vadam|Thel 'Vadam's]] forces and united to prevent the [[Chieftain of the Jiralhanae]], [[Tartarus]], from activating Delta Halo and firing the Halo Array.{{Ref/Level|Id=journey|H2|[[The Great Journey]]}} The Arbiter fought Tartarus face to face, while Johnson picked away at the Jiralhanae's shields with a [[beam rifle]] from afar. After killing Tartarus, the Arbiter solidified this alliance of circumstance by bringing in all local Sangheili forces to side with Commander [[Miranda Keyes]] and the UNSC. A shaky alliance between these Sangheili and their former foes, the [[human]]s, was forged out of necessity and revenge against the Covenant to some extent.{{Ref/Level|H3|[[The Covenant (level)|The Covenant]]|Quote=I will have my revenge on a Prophet, not a plague!}} Both sides had two common enemies that wished for their extinction: the Covenant and the Flood. Meanwhile, [[Rtas 'Vadum]] led a strike team of Sangheili to capture the ''[[Shadow of Intent]]'' from the Jiralhanae as a flagship for their local forces, forming the [[Fleet of Retribution]].
 
The Fleet of Retribution stayed behind on Delta Halo to quarantine the Flood outbreak by [[glassing]] the surface, while the Arbiter joined the UNSC forces back to Earth to chase the High Prophet of Truth. Truth was excavating [[Portal at Voi|the Forerunner artifact]] on Earth that Regret had discovered nearly a month prior and was seeking to use it to travel to the Ark to fire all the Halo rings. Weeks later on November 17, the devastated [[UNSC Home Fleet]] attempted a last-ditch assault on Truth's Forerunner Dreadnought, which had integrated with the portal artifact. This attack failed while a [[Indulgence of Conviction|Flood-controlled battlecruiser]] crashed in [[Voi]] only moments after Truth's Dreadnaught and the rest of his fleet entered the [[Slipspace portal|portal]] generated by the artifact.<ref>'''[[Halo 3]]''', campaign level ''[[The Storm]]''</ref>
 
The Sangheili [[Fleet of Retribution]], led by [[Shipmaster]] [[Rtas 'Vadum]], arrived at Earth in pursuit of the Flood infested cruiser. Several Sangheili were deployed to assist the UNSC forces in containing the Flood in Voi from spreading across the entire planet. After the allied forces were airborne, the Fleet of Retribution glassed the city and its environs under the order of Shipmaster 'Vadum, Arbiter Thel 'Vadam had persuaded him that only glassing the local area was necessary as opposed to the whole planet. This led to a debate between Shipmaster 'Vadum and [[Fleet Admiral]] [[Lord Terrence Hood]]. The Sangheili and Commander Miranda Keyes' forces agreed to follow Truth to the Ark beyond the portal.<ref name="floodgate">'''Halo 3''', campaign level ''[[Floodgate]]''</ref>{{clear}}
 
====The Ark====
[[File:TruthDeath-large.jpg|thumb|250px|The death of the Prophet of Truth.]]
The joint Sangheili-UNSC fleet arrived at the Halo Array's control center, [[Ark]] [[Installation 00]], on December 11 where they engaged [[Truth's fleet]]. During the [[Battle of Installation 00|ensuing conflict]], the Fleet of Retribution completely destroyed their Jiralhanae counterpart in the space battle, despite the latter's three-to-one numerical superiority.<ref name="ark">'''Halo 3''', campaign level ''[[The Ark (level)|The Ark]]''</ref>
 
Sangheili ground forces were later deployed to the [[Battle of the Citadel|final battle]] of the war, riding in green colored {{Pattern|Ru'swum|Phantom}}s to match the UNSC, and helped Spartan John-117 disable the shield generators protecting the installation's [[Installation 00 Citadel|Citadel]] where the High Prophet of Truth was hiding. As the Sangheili forces killed many Jiralhanae, John-117 and Arbiter Thel 'Vadam entered the Citadel and fought through what remained of Truth's personal guard. Truth desperately communicated holographic messages to his followers, blaming the [[Sangheili|heretics]] and the parasite. After reaching the control panel the Arbiter discovered that the Hierarch had been infected by the Flood; as the High Prophet slipped in and out of lucidity, 'Vadam exchanged a few words with him before stabbing him through the back with his [[Energy Sword]].<ref name="cove">'''Halo 3''', campaign level ''[[The Covenant (level)|The Covenant]]''</ref> The High Prophet of Truth and his forces were dead, effectively dissolving the Covenant.
 
With the war over, Shipmaster 'Vadum evacuated the remaining Sangheili and human forces aboard his flagship, the ''[[Shadow of Intent]]'', and left Master Chief John-117 and the Arbiter behind to deal with the Flood at their request. Any remaining Covenant forces were presumed to be killed when Halo [[Installation 08]] was activated and the Ark was severely damaged by the debris; though a few remnants held out in the ''[[Anodyne Spirit]]'' and had miraculously managed survived even years after the war.{{Ref/Book|[[Sacrifice]]}} The firing of the incomplete ring had also ended the threat of the Flood. The Master Chief, the Arbiter, and the AI [[Cortana]] had escaped on the frigate {{UNSCShip|Forward Unto Dawn}}, which was split in half when their escape portal closed too early.<ref name="h3 halo">'''Halo 3''', campaign level ''[[Halo (Halo 3 level)|Halo]]''</ref>
 
==Aftermath==
===Continuation of hostilities===
[[File:Escalation schism.png|thumb|200px|left|An Elite fights against a Brute raiding his settlement.]]
{{Main|Sangheili-Jiralhanae war}}
 
With Truth dead, High Charity destroyed, and the Ark heavily damaged after Installation 08's firing, some of the remaining [[Jiralhanae]] forces tried to rebuild their tattered strength to continue their war of conquest.<ref>'''Halo 3''', multiplayer level ''[[Assembly]]''</ref> The [[San'Shyuum]] eventually abandoned them to hide from the vengeful wrath of the [[Sangheili]],  as the Jiralhanae collapsed into various civil wars. The Jiralhanae resorted to raiding Sangheili settlements, plundering resources for survival. Some Sangheili commanders kept up the offensive against them for at least another six years, even as they continued to lose irreplaceable warships and the war continued with no end in sight.{{Ref/Reuse|The Return}}
 
{{clear}}
 
==Timeline==
===2552===
'''September 22:'''
*[[Installation 04]] is destroyed by [[United Nations Space Command|UNSC]] forces. Its [[monitor]], [[343 Guilty Spark]], escapes to [[Threshold]]. The [[Fleet of Particular Justice]] is damaged. The fleet's secondary flagship, the ''[[Ascendant Justice]]'', is captured by humans.<ref>'''Halo: First Strike''', ''page 96'' (2010 edition)</ref>
*A [[Covenant]] artifact retrieval team led by [[Sesa 'Refumee]] is investigating a [[Threshold gas mine|Forerunner gas mine]] in Threshold's atmosphere when he encounters 343 Guilty Spark. Inspired by Spark's words, 'Refumee and his team [[Sesa 'Refumee's heretic faction|go into open rebellion]] against the [[Hierarchs|High Prophets]] of the Covenant.<ref>'''[[Halo: Combat Evolved Anniversary]]''', ''[[Terminal (Halo: Combat Evolved Anniversary)|Terminal 11]]''</ref>
 
'''October 20:'''
*[[Thel 'Vadam]]ee, the [[Supreme Commander]] of the Fleet of Particular Justice, is tried before the [[High Council]] and sentenced to death. However, the [[Prophet of Truth|High Prophet of Truth]] overrides the Council and makes the Supreme Commander an [[Arbiter]] of the Covenant. Truth then sends him to kill Sesa 'Refumee and destroy his rebellion, which they dub "[[List of known Covenant heretics|heresy]]".<ref>'''Halo 2''', campaign level ''[[The Arbiter]]''</ref>
*Start of the [[Battle of Earth]]. The defeated [[Prophet of Regret|High Prophet of Regret]] is forced to retreat to [[Installation 05]], pursued by the {{UNSCShip|In Amber Clad}}.<ref>'''Halo 2''', campaign level ''[[Metropolis]]''</ref>
*Moments after Regret's withdrawal, Jiralhanae within the Covenant forces quickly kill all Sangheili and seize control of the Covenant forces on Earth under secret orders of the Prophet of Truth.{{Ref/Reuse|oct20}}
*The Arbiter and a [[Special Operations Commander]], [[Rtas 'Vadum]]ee lead a team of [[Covenant Special Operations|Special Operations]] forces to Threshold, where they kill Sesa 'Refumee and successfully crush his rebellion.<ref>'''Halo 2''', campaign level ''[[The Oracle]]''</ref>
 
'''October 21:'''
*The Prophet of Truth's Jiralhanae-led reinforcement fleet arrives at Earth and starts the excavation of the [[Portal at Voi|Ark Portal]]. They kill all remaining Sangheili in the city.{{Ref/Reuse|odst}}
 
'''November 2:'''
*The [[John-117|Master Chief]] tracks down and kills the Prophet of Regret on Installation 05.<ref>'''Halo 2''', campaign level ''[[Regret (Halo 2 level)|Regret]]''</ref>
*[[High Charity]] and its [[High Charity defense fleet|defense fleet]] arrive at Installation 05. Witnessing the assassination of the Prophet of Regret, the Prophet of Truth [[Changing of the Guard|replaces]] the [[Covenant Honor Guard]] [[Sangheili]] with [[Jiralhanae]]. Insulted, the [[Sangheili Councilor]]s threaten to resign from the High Council.{{Ref/Reuse|icon}}


'''November 3:'''
[[Category:The Covenant]]
*The Arbiter and Tartarus are sent to retrieve Installation 05's [[activation index]]. The Arbiter successfully takes the index, but Tartarus tries to kill him and takes the index from him, having been secretly ordered to do so by the Prophet of Truth.<ref>'''Halo 2''', campaign level ''[[Quarantine Zone]]''</ref>
[[Category:Wars]]
*Most of the Sangheili Councilors are taken to the surface of Installation 05 where they are murdered by the [[Jiralhanae]].{{Ref/Reuse|uprising}}
*The Prophet of Truth transfers command of the [[Covenant military]] to the Jiralhanae, while Tartarus declares war on the Sangheili, and the [[Fall of High Charity]] begins. Fighting between Sangheili and Jiralhanae forces breaks out all over High Charity. As word spreads, fighting takes place throughout the fleet, as Sangheili and Jiralhanae controlled ships attack one another.{{Ref/Reuse|gravemind}}
*The [[Flood]] invade High Charity during the battle, entering the city's dome via precision [[Slipstream space|slipspace]] jump aboard {{UNSCShip|In Amber Clad}} and its embarked [[D77-TC Pelican|Pelicans]]. The [[Prophet of Mercy|High Prophet of Mercy]] is attacked by a [[Pod infector]] and abandoned by the Prophet of Truth, who now reigns as the Covenant's sole leader.{{Ref/Reuse|gravemind}}
*Tartarus attempts to activate [[Installation 05]] by forcing [[Miranda Keyes|Commander Miranda Keyes]] to insert the Index into the Control Room's [[The Core|Core]].{{Ref/Reuse|journey}}
*Thel 'Vadamee, with the aid of [[Avery Johnson|Sergeant Johnson]] and Rtas 'Vadumee, kills Tartarus.{{Ref/Reuse|journey}}
*Commander Keyes aborts the activation of Installation 05, placing the entire [[Halo Array]] on standby status. [[343 Guilty Spark]] reveals the existence of [[Installation 00|the Ark]].{{Ref/Reuse|journey}}
*The Flood takes control of High Charity and many of its warships. [[Jiralhanae]] and [[Sangheili]] fleets remaining around the city-station continue to destroy each other.{{Ref/Reuse|journey}}
*The Prophet of Truth departs High Charity for Earth aboard the Forerunner Dreadnought, to join the [[Battle of Earth]]. The [[Jiralhanae]] forces there are already engaged in fighting with the [[United Nations Space Command|UNSC]]. Unbeknown to the [[Prophet of Truth]], John-117 is on the ship, with the intention of "finishing the fight".{{Ref/Reuse|journey}}
*The [[prowler]] ''[[UNSC Dusk|Dusk]]'' witnesses the battle between Sangheili and Jiralhanae held ships above [[Installation 05|Delta Halo]], both fighting each other pausing only to escalate an immediate outbreak of the [[Flood]] from the ringworld. Dusk subsequently flees the battle and links up with [[Patterson's battle group]] at Earth.<ref>'''Halo: Ghosts of Onyx''', ''page 199''</ref>
*[[Sangheili Major]] [[Voro Nar 'Mantakree|Voro 'Mantakree]] kills his [[shipmaster]], [[Tano 'Inanraree]], while he is attempting to allow the [[Flood]] to enter the ship. He then assumes command of the ship, the ''[[Incorruptible]]'', and becomes the ''de facto'' leader of the [[Second Fleet of Homogeneous Clarity]]. He leads his new forces to [[Joyous Exultation]], pursued by the [[Jiralhanae]] [[Gargantum]] and his ships.<ref>'''Halo: Ghosts of Onyx''', ''page 189''</ref>
*[[Imperial Admiral]] [[Xytan 'Jar Wattinree]] plans to lure the [[Jiralhanae]] leadership to the Sangheili base world [[Joyous Exultation]] and plans an ambush for them. He deploys the newly-promoted [[Fleet Master]] [[Voro Nar 'Mantakree]] to [[Onyx]] to recover the [[Forerunner]] technologies there and prevent the UNSC forces there from claiming it themselves. A [[NOVA bomb]] captured by the [[Sh'wada-pattern supercarrier|supercarrier]] ''[[Sublime Transcendence]]'' devastates the planet moments after 'Mantakree's forces leave, the survivors joining 'Mantakree at Onyx.<ref name="GoO244">'''Halo: Ghosts of Onyx''', ''pages 244-245''</ref>


'''November 8:'''
*The Forerunner Dreadnought arrives in the [[Sol system]], and proceeds on course towards Earth at near-relativistic speeds.<ref name="bnet">[http://halo.bungie.net/News/content.aspx?type=topnews&cid=16989 '''Bungie.net''': ''Bungie Weekly Update: 01/23/09'']</ref>


'''November 17:'''
*The Forerunner Dreadnought enters [[Earth]]'s atmosphere. [[John-117]] ejects from the ship upon reentry, landing in the jungles near [[Mount Kilimanjaro]].{{Ref/Reuse|bnet}}
*[[Battle of Voi]]. The Prophet of Truth uses the Forerunner Dreadnought to activate the Portal, and his loyalist fleet follows it through the portal. The [[Flood]]-infested Voi, only to be contained by the [[Fleet of Retribution|Sangheili fleet]].{{Ref/Reuse|floodgate}}


'''December 11'''
*News spreads wide through Sangheili fleets, who take in some instances up arms against their Prophet escorts and, more widely, against the Jiralhanae.
*Truth and his loyalists arrive at the Ark, pursued by the Sangheili [[Fleet of Retribution]]. [[Battle of Installation 00|A massive battle]] begins over the Ark. All of Truth's vessels are eventually destroyed over the Ark by the Sangheili fleet.{{Ref/Reuse|ark}}
*Sangheili and human forces [[Battle of the Citadel|fight]] their way to the [[Installation 00 Citadel|Citadel]]. The Prophet of Truth, the last Hierarch of the Covenant, is executed by Thel 'Vadam with help from the Flood. John-117 stops the Ark from firing the Halo rings.{{Ref/Reuse|cove}}
*High Charity is [[Raid on High Charity|destroyed]] by John-117 after he overloads the city's main reactors causing them to detonate.{{Ref/Level|Id=cortana|Halo 3|Level=Cortana}}
*[[Rtas 'Vadum]] evacuates all humans and Sangheili, via the ''[[Shadow of Intent]]'', back to Earth.{{Ref/Reuse|cortana}}
*Arbiter Thel 'Vadam, John-117 and [[Avery Johnson|Sergeant Johnson]] [[Raid on Installation 08|battle]] to the [[control room]] of [[Installation 08]]. Guilty Spark runs [[Rampancy|rampant]], killing Johnson before being subsequently destroyed by John-117. Installation 08's sentinels turn on the Spartan, Thel 'Vadam, and the Sangheili. The unfinished Installation 04 is activated, devastating the Ark and destroying the entire local Flood infestation including the [[Gravemind]]. These final events ended the Human-Covenant War.{{Ref/Reuse|h3 halo}}
*John-117, Cortana, and Thel 'Vadam escape the Ark. With their escape vessel, {{UNSCShip|Forward Unto Dawn}} cut in half upon slipspace transition, only Thel 'Vadam gets back to Earth.{{Ref/Reuse|h3 halo}}


==Trivia==
*A "[[Wikipedia:Schism (religion)|schism]]" is a division within a religious sect or denomination. The term "Great Schism" is sometimes used to describe real-world internal religious debates, most notably the [[Wikipedia:East-West Schism|East-West Schism]], which led to the establishment of the [[Wikipedia:Eastern Orthodox Church|Eastern Orthodox Church]], and the [[wikipedia:Western Schism|Western Schism]], which caused a split within the [[Wikipedia:Roman Catholic Church|Roman Catholic Church]].
*In ''[[Halo: Contact Harvest]]'', the [[Prophet of Truth]] foreshadows the Great Schism, noting that if the Sangheili ever separated from the Covenant, the entire government would collapse.<ref>'''Halo: Contact Harvest''', ''page 152''</ref>
*According to the [[Bestiarum]], the [[Unggoy]] were too indecisive to continue the rebellion and the true political motivation of the [[Mgalekgolo]], if any, remained a mystery.
*In ''Halo 3: ODST'', it is implied that the [[Office of Naval Intelligence]] was aware of internal conflict within the Covenant from early on. During the level ''[[Tayari Plaza]]'' which takes place on October 20, [[Edward Buck|Buck]] asks [[Veronica Dare|Dare]] about the Sangheili bodies lying around the city, as they appear to have been killed by the Jiralhanae; Dare responds that said information is classified.


==Gallery==
<gallery>
File:H2A - Changing of the Guard.jpg|The Jiralhanae assume the title of Honor Guard from the Sangheili, accelerating the eventual conflict between the two races.
File:H2A - Inevitable betrayal.jpg|Acting on the Prophets' orders, Tartarus and the Brutes betray the Arbiter and claim the "[[Index|Sacred Icon]]".
File:TheReturn_Execution.jpg|The Sangheili watch as the Jiralhanae Chieftains betray and murder their comrades, igniting the Schism.
File:H2A_-_Great_Schism.jpg|Sangheili and Jiralhanae ships war above High Charity.
File:H2A Great Schism.png|Civil war rages among the Covenant around High Charity.
File:H2A Terminals - Great Schism.png|Ships battle over High Charity.
File:H2A ElitesVsBrutes.png|Brutal close-quarters fighting between Sangheili and Jiralhanae soldiers in one of High Charity's [[Valleys of Tears|environmental modules]].
File:H2A MausoleumBattle.png|Sangheili and Jiralhanae clash within High Charity's [[Mausoleum of the Arbiter]].
File:H3 - Retribution Victory vs Truths Fleet.png|The Prophet of Truth's armada prepares to engage the Arbiter's [[Fleet of Retribution]] during the [[Battle of Installation 00]].
File:HRoA4_Volir_Great Schism.png|Shipmaster [[Let 'Volir]] sees the conflict devolve into senseless feuds.
</gallery>


==List of appearances==
*''[[Halo 2]]'' {{1st}}
*''[[Halo: Ghosts of Onyx]]''
*''[[Halo: Uprising]]''
*''[[Halo 3]]''
*''[[Halo 3: ODST]]''
*''[[Halo Legends]]''
**''[[Origins]]''
*''[[Halo: Evolutions]]''
**''[[The Return]]''
**''[[Wages of Sin]]'' {{Mo}}
*''[[Halo: Glasslands]]'' {{Mo}}
*''[[Halo: The Thursday War]]'' {{Mo}}
*''[[Halo: Escalation]]''
*''[[Halo: Mortal Dictata]]'' {{Mo}}
*''[[Halo: Broken Circle]]''
*''[[Halo 2: Anniversary]]''
**''[[Terminal (Halo 2: Anniversary)|Terminals]]''
*''[[Halo: New Blood]]'' {{Mo}}
*''[[Halo: Hunters in the Dark]]'' {{Mo}}
*''[[Halo 5: Guardians]]'' {{Mo}}
*''[[Halo Mythos: A Guide to the Story of Halo]]'' {{Mo}}
*''[[Halo: Fractures]]''
**''[[Breaking Strain]]'' {{Mo}}
*''[[Halo: Tales from Slipspace]]''
**''[[Hunting Party]]''
*''[[Halo: Envoy]]'' {{Mo}}
*''[[Halo: Retribution]]'' {{Mo}}
*''[[Halo: Legacy of Onyx]]'' {{Mo}}
*''[[Halo: Shadows of Reach]]'' {{Mo}}
**''[[Sacrifice]]'' {{Mo}}
*''[[Halo: Divine Wind]]'' {{Mo}}
*''[[Halo Infinite]]'' {{Mo}}
*''[[Halo: Outcasts]]'' {{Mo}}
*''[[Halo: Age of Retribution]]''


==Notes==
{{Ref/Notes}}
==Sources==
{{Ref/Sources|2}}
{{Covenantwars}}


[[Category:History of the UNSC]]
.

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