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{{Status|Canon}}
{{Era|Post}}
{{Battle infobox
{{Under Construction}}
{{Battle Infobox
|name=Battle of Requiem
|name=Battle of Requiem
|prev=[[Mission to the Korinth Prior system]]
|prev=[[Mission to Alpha Shard]]
|next=[[Raid on Ivanoff Station]]
|next=[[Raid on Ivanoff Station]]
|image=[[File:Mantis in action.jpg|300px]]
|image=[[File:Mantis in action.jpg|300px]]
|conflict=[[Post-Covenant War conflicts]]
|conflict=[[Post-Covenant War conflicts]]
|date=[[2557#July|July 21–23, 2557]]{{Ref/Level|Id=july21|Game=Halo 4|Level=Dawn|Quote=[[Battle of Installation 00|LAST CONTACT]] WITH UNSC: 4 YEARS, 7 MONTHS, 10 DAYS}}{{Ref/Note|While the end date of the Battle of Requiem is unknown, it is known that the [[Raid on Ivanoff Station]] occurred on July 24 and the [[New Phoenix Incident]] on July 25. Due to the fact that Forerunner vessels are capable of near-instantaneous slipspace travel, it may logically be assumed that the Battle of Requiem continued until around July 23.}}
|date=July 21-23, 2557
|place=[[Requiem]], [[Epoloch system]]
|place=[[Requiem]], [[Epoloch system]], [[Milky Way galaxy]]
|result='''Jul 'Mdama's Covenant/Promethean victory'''
|result='''Promethean/Covenant victory'''
*Requiem remains under control of [[Jul 'Mdama's Covenant]] and [[Promethean]]s.{{Ref/Reuse|SOE1}}
*UNSC forces leave Requiem, John-117 fails to prevent the Didact's departure
*[[Ur-Didact]] succesfully released and departed from [[Requiem]] aboard ''[[Mantle's Approach]]'' along with a portion of the Covenant fleet.{{Ref/Reuse|Shutdown}}
*Requiem remains under Promethean/'Mdama's Covenant control
**[[John-117]] chases the Didact to [[Installation 03]].{{Ref/Reuse|Shutdown}}
|side1=*[[United Nations Space Command]]<br>
*UNSC forces leave Requiem and return to [[Earth]].{{Ref/Reuse|Shutdown}}
*[[Reclaimer]]-allied [[Sentinels]]<br>
|side1=*{{Icon|UNSC Post}} [[United Nations Space Command]]
<small>''Supported by:''</small><br>
**{{Icon|Navy}} [[UNSC Navy]]
[[Lifeworker]]s
**{{Icon|Army}} [[UNSC Army]]
|side2=*[[Promethean#Mechanical Prometheans|Promethean]]s<br>
**[[UNSC Marine Corps]]
*[[Jul 'Mdama's Covenant faction]]
**[[Spartan Operations]]
|commanders1=[[Andrew Del Rio|CAPT Andrew Del Rio]]<br>
----
[[Thomas Lasky|CMDR Thomas Lasky]]<br>
*{{Icon|Forerunner}} [[Sentinel|Forerunner constructs]]
[[John-117|MCPO John-117]]<br>
|side2=
[[Librarian#Imprint_on_Requiem|Librarian imprint]]
*{{Icon|Mdama}} [[Jul 'Mdama's Covenant]]
|commanders2=[[Ur-Didact]]<br>
*{{Icon|Didact}} [[Prometheans#Mechanical Prometheans|Prometheans]]{{Ref/Note|Initially hostile to [[Jul 'Mdama's Covenant]] until [[Ur-Didact]]'s awaken.}} {{C|Both Librarian and Didact's control}}
[[Supreme Commander]] [[Jul 'Mdama]]
|commanders1=*[[Captain (NAVCOM)|CAPT]] [[Andrew Del Rio]]{{Ref/Reuse|Infinity}}
|forces1=*{{UNSCShip|Infinity}}
*[[Commander|CMDR]] [[Thomas Lasky]]{{Ref/Reuse|Infinity}}
*Ten internally docked {{Class|Strident|heavy frigate}}s
*[[Spartan Commander]] [[Sarah Palmer]]{{Ref/Reuse|Infinity}}
*Two {{Class|Paris|heavy frigate}}s<ref name="The Commissioning">''[[The Commissioning]]''</ref>
----
*Multiple [[D79-TC Pelican]]s
*[[Librarian#Imprint on Requiem|Librarian imprint]]{{Ref/Reuse|rec}}
**At least one [[G79H-TC Pelican]]
|commanders2=
*Several [[F-41 Broadsword]]s
*[[Supreme Commander]] [[Jul 'Mdama]]{{Ref/Reuse|song}}{{Ref/Reuse|jul}}
*At least one [[M510 Mammoth]]
*[[Ur-Didact]]{{Ref/Reuse|Forerunner}}
*Multiple [[M808C Scorpion]]s
|forces1=*1 {{class|Charon|light frigate}}†{{Ref/Reuse|Dawn}} {{c|aft half}}
*At least one [[Mantis]]
*[[UNSC Infinity|''Infinity''{{'}}s]] [[UNSC Navy|fleet]]{{Ref/Reuse|forward5}}{{Ref/Reuse|The Commissioning}}<!--Please do not assume this fleet as Battle Group Dakota or Expeditionary Strike Group 1 until a source confirm the name of the fleet-->
*Multiple [[M12G1 Gauss Warthog]]s
**1 {{Class|Infinity|supercarrier}}{{Ref/Reuse|Forerunner}}
*Multiple [[M12 Warthog LRV]]s
**18+ {{Class|Autumn|heavy cruiser}}s{{Ref/Film|Id=forward5|Halo 4: Forward Unto Dawn|Episode=5}}{{Ref/Note|Id=unscfleet|Text=While only two {{class|Paris|heavy frigate}}s were known to arrive at Requiem as they were seen approaching [[Requiem]] along with {{UNSCShip|Infinity}} on ''[[The Commissioning]]'', the later ''[[Halo 4: Forward Unto Dawn]]'' film shows dozens of more ''Paris''-class frigates as well as {{Class|Autumn|heavy cruiser}}s accompagnying ''Infinity'' while departing for Requiem, which would be likely that these 2 ''Paris''-class frigates escorting ''Infinity'' were indeed part of the larger UNSC fleet shown in the latter, though the status of the escorting fleet when ''Infinity'' was pulled into Requiem are unknown as the only ''Infinity'' was known to have entered inside Requiem.}}
*One [[SPARTAN-II program|SPARTAN-II]]
**35+ {{Class|Paris|heavy frigate}}s{{Ref/Reuse|forward5}}{{Ref/Film|Id=The Commissioning|Film=The Commissioning}}{{Ref/NoteReuse|unscfleet}}
*300-500 [[SPARTAN-IV program|SPARTAN-IV]]s
**Several [[F-41 Broadsword]]s{{Ref/Reuse|Infinity}}
*[[UNSC Marine Corps|Marine Corps]] expeditionary personnel
**Multiple [[D79-TC Pelican]]s{{Ref/Reuse|Infinity}}
*[[UNSC Army|Army]] expeditionary personnel
***1+ [[G79H-TC Pelican]]{{Ref/Reuse|Shutdown}}
*Two AIs
**1+ [[M510 Mammoth]]{{Ref/Reuse|rec}}
**[[Cortana]]
**Multiple [[M808C Scorpion]]s{{Ref/Reuse|Infinity}}
**[[Aine]]
**1+ [[HRUNTING/YGGDRASIL Mark IX Mantis|Mark IX Mantis]]{{Ref/Reuse|Infinity}}
|forces2=*[[Promethean]] forces
*Multiple [[M12R Rocket Warthog]]s{{Ref/Reuse|rec}}
**[[Promethean Knight|Knight]]s
*Multiple [[M12G1 Gauss Warthog]]s{{Ref/Reuse|rec}}
**[[Promethean Watcher|Watche]]s
*Multiple [[M12 Chaingun Warthog]]s{{Ref/Reuse|Infinity}}
**[[Promethean Crawler|Crawler]]s
*Many ground forces
*Jul 'Mdama's fleet
**1 [[SPARTAN-II program|Spartan-II]]{{Ref/Reuse|Dawn}}
**[[Song of Retribution|One]] {{Class|CAS|assault carrier}}
**300-500 [[SPARTAN-IV program|Spartan-IV]]s{{citation needed}}
**At least two {{Class|RCS|armored cruiser}}s
**[[UNSC Marine Corps|Marine]] and [[UNSC Army|Army]] expeditionary personnel{{Ref/Reuse|Infinity}}
**Numerous {{Class|CRS|light cruiser}}s
----
*At least one [[Type-56 Lich]]
*Several [[Aggressor Sentinel]]s{{Ref/Reuse|Requiem}}
*Multiple [[Type-44 Phantom]]s
|forces2=
*Multiple [[Type-26 Banshee|Type-26B Banshee]]s
Jul 'Mdama's fleet{{Ref/Site|Id=song|URL=https://www.halowaypoint.com/en-us/universe/vehicles/song-of-retribution|Site=Halo Waypoint|Page=Song of Retribution|D=20|M=07|Y=2021}}
*Multiple [[Type-26 Wraith]]s
*1+ {{Class|CAS|assault carrier}}{{Ref/Reuse|song}}{{Ref/Reuse|jul}}
*Multiple [[Type-32 Ghost]]s
*Numerous {{Pattern|Zanar|light cruiser}}s{{Ref/Reuse|Dawn}}
*Thousands of Covenant infantry
*Several air vehicles
**Multiple {{Pattern|Kmiro'sish|Lich}}es{{Ref/Reuse|Shutdown}}
**Multiple {{Pattern|Ru'swum|Phantom}}s{{Ref/Reuse|Dawn}}
**Multiple {{Pattern|Is'belox|Banshee}}s{{Ref/Reuse|Dawn}}
*Several ground vehicles
**Multiple {{Pattern|Zurdo|Wraith}}s{{Ref/Reuse|Infinity}}
**Multiple {{Pattern|Karo'etba|Ghost}}s{{Ref/Reuse|Requiem}}
*Numerous ground forces{{Ref/Reuse|Requiem}}
**[[Sangheili]]
**[[Sangheili]]
**[[Unggoy]]
**[[Unggoy]]
**[[Kig-Yar]]
**[[Kig-Yar]]
**[[Mgalekgolo]]
**[[Lekgolo]]
----
*Combat [[Cryptum]]
*1 [[Cryptum#Requiem|"Combat Cryptum"]]{{Ref/Reuse|Infinity}}
|casual1=*Both ''Paris''-class frigates<ref name="The Commissioning"/>
*4 [[Z-8060 particle cannon]]s†{{Ref/Reuse|rec}}
*Several SPARTAN-IVs
*Several [[Z-510 focus turret]]s{{Ref/Reuse|Forerunner}}
*Unknown number of Marine and Army personnel
*Multiple [[Promethean Knight]]s{{Ref/Reuse|Forerunner}}
*Multiple Pelicans
*Multiple [[Promethean Watcher]]s{{Ref/Reuse|Forerunner}}
*''Infinity'' AI Aine<ref name="Waypoint">[https://www.facebook.com/HaloWaypoint/posts/10152099361122679 '''Halo Waypoint''' - ''Today in Halo: 12/05/2557'']</ref>
*Multiple [[Promethean Crawler]]s{{Ref/Reuse|Forerunner}}
|casual2=*Large number of Promethean forces
|casual1=
*Large number of 'Mdama's forces
*Aft half of {{UNSCShip|Forward Unto Dawn}}{{Ref/Reuse|Requiem}}
**Several ''CRS''-class light cruisers
*Multiple Pelicans{{Ref/Reuse|Infinity}}
**Multiple [[Type-56 Lich]]es
*''[[UNSC Infinity|Infinity]]'' AI [[Aine]]<ref name="Waypoint">[https://www.facebook.com/HaloWaypoint/posts/10152099361122679 '''Halo Waypoint''' - ''Today in Halo: 12/05/2557'']</ref>
*Heavy ground casualties{{Ref/Reuse|Infinity}}
**Unknown number of SPARTAN-IVs
**Many Marine and Army personnel
|casual2=
*At least 7 ''CRS''-class light cruisers{{Ref/Reuse|Dawn}}
*Heavy air casualties
**Multiple {{Pattern|Kmiro'sish|Lich}}es{{Ref/Reuse|Requiem}}
*4 particle cannons{{Ref/Reuse|rec}}
*Heavy ground casualties
}}
}}
{{Quote|Non-believers walk the sacred ground. Purge the heretics, so they not foul the air of Paradise. The time has come to enter the Great Light. The Promethean awakening is nigh, our reward is at hand.|A transmission from Jul's Covenant (translated by [[Cortana]]) on their [[proselytization network]]}}
{{Quote|Non-believers walk the sacred ground. Purge the heretics, so they not foul the air of Paradise. The time has come to enter the Great Light. The Promethean awakening is nigh, our reward is at hand.|A Covenant transmission (translated by [[Cortana]]) on their [[battlenet]]}}
 
The '''Battle of Requiem''' was a series of skirmishes on the [[Forerunner]] [[shield world]] [[Requiem]] beginning on [[2557|July 21, 2557]]. It was waged between the [[Promethean]]s occupying Requiem, [[Jul 'Mdama's Covenant faction]] and the [[United Nations Space Command]].<ref name="Dawn">'''Halo 4''', campaign level ''[[Dawn (level)|Dawn]]''</ref> Shortly after the beginning of the battle, the Prometheans and 'Mdama's Covenant would join forces against humanity.<ref name="Infinity">'''Halo 4''', campaign level ''[[Infinity (Halo 4 level)|Infinity]]''</ref> These events marked the continuation of an [[Post-Covenant War conflicts|ongoing conflict]] with Jul 'Mdama's Covenant faction and the UNSC, and the days following would see the conflict spread to ''[[Ivanoff Station]]'' orbiting [[Installation 03]], and the [[human]] homeworld, [[Earth]].<ref>'''Halo 4''', campaign level ''[[Midnight]]''</ref> Requiem would again become a battleground over six months after the initial battle in [[2558|February 2558]] when the UNSC launched [[Requiem Campaign|a lightning-strike]] expedition to the surface of Requiem.<ref name="SOE1">[[S1/Departure|'''Spartan Ops:''' ''S1E1 Departure'']]</ref>
The '''Battle of Requiem''' was a series of [[battle#Skirmishes|skirmishes]] on the [[Forerunner]] [[shield world]] [[Requiem]] beginning on [[2557#July|July 21, 2557]].{{Ref/Reuse|july21}} It was waged between the [[Promethean]]s occupying Requiem, [[Jul 'Mdama|Jul 'Mdama's]] [[Jul 'Mdama's Covenant|Covenant forces]] and the [[United Nations Space Command]].{{Ref/Level|Id=Dawn|Halo 4|[[Dawn]]}} Shortly after the beginning of the battle, the Prometheans and 'Mdama's Covenant would join forces against humanity.{{Ref/Level|Id=Infinity|Halo 4|[[Infinity (Halo 4 level)|Infinity]]}} These events marked the continuation of an [[Post-Covenant War conflicts|ongoing conflict]] with Jul 'Mdama's Covenant and the UNSC, and the days following would see the conflict [[Raid on Ivanoff Station|spread]] to ''[[Ivanoff Station]]'' orbiting [[Installation 03]], and later the Prometheans would [[New Phoenix Incident|attack]] the [[human]] homeworld, [[Earth]].{{Ref/Level|Id=Midnight|Halo 4|[[Midnight]]}} Requiem would again become a battleground over six months after the initial battle in [[2558|February 2558]] when the UNSC launched [[Requiem Campaign|a lightning-strike]] expedition to the surface of Requiem.{{Ref/Game|Id=SOE1|Game=Spartan Ops|[[S1/Departure|S1E1 Departure]]}}


==Background==
==Background==
[[File:H4-Terminal-Village-Mantle.jpg|thumb|left|250px|In the last year of the Forerunner-Flood war, the Ur-Didact planned to finish what it remains within the [[Erde-Tyrene civilization|heavily-weakened humanity]] using the Composer.]]
{{Quote|[[Human]]ity's [[Mind transfer|loss]] of its biological form will serve as final payment for their [[Human-Forerunner wars|crimes]]. It is a kindness they ''do not'' deserve.|The [[Ur-Didact]] to [[Librarian]].{{Ref/Reuse|terminal6}}}}
In the [[97,445 BCE|final year]] of the [[Forerunner-Flood war]], the [[Ur-Didact]] used a [[Composer]]—a secret massive [[Forerunner]] device capable of converting living beings into digital form that was long abandoned—in order to convert his loyal [[Promethean]] warriors into [[Promethean Knight]]s to combat the Flood with risk of infection, but failed due to their insufficient number.{{Ref/Game|Halo 4|[[Terminal (Halo 4)|Terminal 5]]}}{{Ref/Game|Id=terminal6|Halo 4|[[Terminal (Halo 4)|Terminal 6]]}} During the [[Flood]] and [[star road]]s' [[Battle of the greater Ark|invasion]] of the [[Greater Ark]], while attempting to gain additional Knight forces in his mechanized army, returned to [[Requiem]], the Didact took his personal [[flagship]] ''[[Mantle's Approach]]''—supported by thousands of [[sentinel]]s under his command—to [[Omega Halo]], the youngest of dozen original [[Halo Array|Halo installations]], and fired the Composer upon the ring to harvest the installation's entire [[Erde-Tyrene civilization|human population]], which was the majority of the remaining human specimens the [[Librarian]] had taken from [[Earth]].{{Ref/Reuse|terminal6}}{{Ref/Novel|Novel=Halo: Silentium|Detail=Strings 31-32}} The Ur-Didact would serve the loss of the biological form of the human race by being forever imprisoned into digital form as the final punishment for [[Human-Forerunner wars|defying]] the Forerunners earlier when [[ancient humanity|ancient mankind]] used to be their rival, until their [[Battle of Charum Hakkor|downfall]].{{Ref/Reuse|terminal6}} He would also plan to eradicate what remains of humanity, along with every other "suspect" species that may threaten the Forerunners' hold of the [[Mantle]], to ensure that only the Forerunners would be worthy to hold the Mantle.{{Ref/Novel|Novel=Halo: Silentium|Page=289}}
The loss of most of mankind, and Didact's betrayal, prompted the Librarian to have the Didact exiled into a [[Cryptum]] for a second time, now viewing the [[Warrior-Servant]] as a traitor by the [[IsoDidact]] for his genocide and also deserting the Forerunners.{{Ref/Reuse|Id=strings34}}{{Ref/Novel|Novel=Halo: Silentium|Detail=Strings 33}} When the Didact was imprisoned by his wife in a "combat" Cryptum previously maintained on ''Mantle's Approach'' at the [[core of Requiem]], after being incapacitated by two shots from a [[Z-750 binary rifle]], the Librarian hoped her husband would spend his time in meditation reflecting upon his past misdeeds, and that the damage wrought on his mind by the Gravemind, would be corrected with aid from contact with the [[Domain]]. The Forerunner Promethean constructs were taken over by the Librarian to prevent the Ur-Didact from being reawakened until his meditation would be complete.{{Ref/Game|Id=terminal7|Halo 4|[[Terminal (Halo 4)|Terminal 7]]}}{{Ref/Novel|Id=strings34|Novel=Halo: Silentium|Detail=Strings 34}} This would force the Didact to halt his planned genocide against humanity and instead help his former foes eventually ascend into the new [[Reclaimer|caretakers]] of the [[Milky Way|galaxy]], by educating them on the Mantle and the Forerunners' technological achievements with the [[Janus Key]].{{Ref/Reuse|terminal7}}{{Ref/Game|Id=SOE9|Game=Spartan Ops|[[Key|S1E9 Key]]}} However, it was considered a shocking failure to the Librarian, after learning the Domain's true nature as a [[Precursor]] creation, as well as the mythical [[Organon]], and that the activation of the final Halo Array would destroy the Domain along with all Precursor constructs, by dismantling neural physics, ensuring the Forerunners' history would be lost. As the Halo Array [[Great Purification|fired]], the Domain and the rest of the Precursor artifacts were destroyed, leaving the Ur-Didact condemned to spend the next 100,000 years in complete silence, dwelling on his own insanity and rage.{{Ref/Novel|Novel=Halo: Silentium|Page=322-323}}
===Master Chief, Cortana and UNSC===
[[File:Overlayed.png|250px|thumb|left|The Master Chief and Cortana drift toward Requiem after the end of the war.]]
{{Quote|I'll drop a [[distress beacon|beacon]], but it'll be a while before anyone finds us.|[[Cortana]] to [[John-117]].{{Ref/Reuse|h3epilogue}}}}
While attempting to flee the incomplete [[Installation 08]]'s [[Raid on Installation 08|premature firing]] meant to stop the [[Flood]] and end the [[Gravemind]], [[Installation 00]] was severed during the [[Battle of Installation 00|final engagement]] of the [[Human-Covenant War]] on [[2552#December|December 11, 2552]]. {{UNSCShip|Forward Unto Dawn}} managed to enter the [[Slipspace portal]] between the Ark and [[Earth]] that was still activated by the [[Portal at Voi]] but it collapsed while the {{UNSCShip|Forward Unto Dawn}} was still inside it, cutting the frigate in half as a result.{{Ref/Level|Halo 3|[[Halo (Halo 3 level)|Halo]]}}{{Ref/Level|Id=h3epilogue|Game=Halo 3|Level=[[Epilogue (Halo 3)|Epilogue]]}} The aft half of the {{UNSCShip|Forward Unto Dawn}}, carrying [[SPARTAN-II Program|Spartan]] [[John-117]] and AI [[Cortana]], was left in an unknown region of empty space and sent adrift towards Requiem. Cortana activated ''Forward Unto Dawn''{{'}}s [[emergency locator beacon]] while the Spartan entered cryostasis.{{Ref/Reuse|h3epilogue}} As the last contact with [[United Nations Space Command|UNSC]] was during the Battle of Installation 00, and only the [[Arbiter]] [[Thel 'Vadam]], aboard the front half of the ''Dawn'', which crashed into the [[Indian Ocean]] upon return to Earth on December 23, John-117 was honored as humanity's greatest hero, and soldier, alongside Cortana. He was listed as [[missing in action]], like all Spartan-IIs that died during the Covenant War and presumed dead.{{Ref/Reuse|h3epilogue}}
In [[2556]], Cortana, still stranded in unknown space, as John-117 still laid unconscious, began to truly experience the effects of [[rampancy]] after [[seven]] years of age.{{Ref/Film|Id=origins|Film=Halo Legends|Story=Origins|StoryLinkText=Origins}} She tried to communicate with the Spartan with no response and also composed a history of Forerunners and of [[human]]ity and their wars since around the [[Forerunner-Flood war|one hundredth millenium]] until 2552.{{Ref/Reuse|origins}} She continued to become more and more unstable as more time passed.{{Ref/Reuse|forward1}} Despite her true rampancy state, Cortana already once experienced signs of rampancy when she was [[Logic plague|tormented]] by the Gravemind aboard the Flood-infested ''[[High Charity]]'', after John-117 returned to Earth via ''[[Anodyne Spirit]]'' to join the united UNSC-[[Fleet of Retribution|Sangheili]] alliance after [[Scramble onboard Forerunner Dreadnought|failing to kill]] the [[Prophet of Truth]].{{Ref/Book|Book=Halo: Evolutions - Essential Tales of the Halo Universe|Section=Human Weakness|SectionLinkText=Human Weakness}}
{{Quote|A science team got zapped excavating a [[Composer|Forerunner artifact]]. This...sensor data is all that was left. And our geeks managed to pull some coordinates. I'll give you three guesses where it led.|[[Captain]] [[Andrew Del Rio]].{{Ref/Reuse|Infinity}}}}
After being commissioned on [[2557#February|February 21, 2557]], known as "''Infinity'' Day", {{UNSCShip|Infinity}}, now re-purposed for peace and exploration, was tasked with finding the remaining [[Halo Array|Halo Installations]] in order to establish permanent UNSC bases for studying and decommissioning the ancient galaxy-destroying ringworlds. By this time, the UNSC had already managed to set up these bases on the [[glassing|glassed]] [[Installation 05]] and [[Installation 03]], the first two Halo rings discovered after the [[Battle of Installation 04|destroyed]] [[Installation 04]].{{Ref/Reuse|Infinity}} After the ''Infinity'' extracted a [[Composer]] from Installation 03 to transport it to ''[[Ivanoff Station]]'', an ONI team were digitized by the Composer while studying and excavating the Forerunner artifact and subsequently, the sensor data from the incident contained coordinates of Requiem, allowing the crew of the ''Infinity'' to find the location of the [[shield world]].{{Ref/Reuse|Infinity}} Simultaneously, [[Commander]] [[Thomas Lasky]] picked up Cortana's distress signal from the ''Dawn'' and learned that John-117 was aboard the light frigate.{{Ref/Reuse|forward1}} He had a flashback as he remembered when he met the Spartan during the [[Covenant]] [[Battle of Circinius IV|invasion]] of [[Circinius IV]] in [[2526#April|April 26, 2526]] when he was saved by him from a [[Unidentified Sangheili Zealot (Circinius IV)|Sangheili Zealot]] and a [[Mgalekgolo]], and was inspired by SPARTAN-117 to rise to the rank of Commander in the [[UNSC Navy]].{{Ref/Film|Id=forward1|Halo 4: Forward Unto Dawn|Episode=1}}{{Ref/Reuse|forward5}} Preparing for the departure to Requiem to recover John-117 and Cortana, UNSC ''Infinity''{{'}}s crew entered cryo as ''Infinity'' led a moderate expeditionary fleet of {{Class|Autumn|heavy cruiser}}s and {{Class|Paris|heavy frigate}}s, into [[slipstream space|slipspace]].{{Ref/Reuse|forward5}}
===Jul 'Mdama===
[[File:H4 SongOfRequiem.png|thumb|left|250px|Jul 'Mdama's ''[[Song of Retribution]]'' remained over Requiem by attempting to enter the shield world for over three years.]]
{{Quote|Requiem's treasures shall be ours.|Jul 'Mdama after finding Requiem in [[2554]]}}
{{Quote|Requiem's treasures shall be ours.|Jul 'Mdama after finding Requiem in [[2554]]}}
Blaming the UNSC for being "correctly" responsible for the death of his wife, [[Raia 'Mdama]], [[Shipmaster]] [[Jul 'Mdama]], who was formerly part of the [[Servants of the Abiding Truth]], opposed the [[Swords of Sanghelios]]'s peace with the [[Unified Earth Government]], vowing to seek vengeance against humanity and establish his [[Jul 'Mdama's Covenant|new faction]], a [[Covenant remnants|revival]] of the former [[Covenant]] going by the same name. In response, 'Mdama accrued a number of [[Covenant starship|Covenant vessels]] in order to amass a fleet large enough to engage the [[UNSC]]'s [[Expeditionary Strike Group 1]], with the traditional {{class|CAS|assault carrier}} ''[[Song of Retribution]]'' being his [[flagship]], and that of his faction, and appointed himself as the [[Supreme Commander]] of his "Covenant".{{Ref/Reuse|song}}
In [[2552#December|December 2552]], the aft half of the {{UNSCship|Forward Unto Dawn}}, carrying [[SPARTAN-II Program|Spartan]] [[John-117]] and AI [[Cortana]], was transported via slipspace on a course toward Requiem after the [[Raid on Installation 04B|last battle]] of the [[Human-Covenant War]]. Cortana activated ''Forward Unto Dawn'''s [[emergency locator beacon]] while the Spartan entered cryostasis.<ref>'''Halo 3''', campaign level ''[[Halo (Halo 3 level)|Halo]]''</ref> Within the next year, [[Jul 'Mdama]] led his forces, a partly reunited offshoot of the Covenant, to Requiem in search of the shield world's "treasure": he sought the [[Ur-Didact|Didact]], the leader of the [[Warrior-Servant|Forerunner military]], due to their mutual hatred of humanity. However, 'Mdama could not find a way into Requiem, so the fleet held station in orbit. On July 21, 2557, the ''Dawn'' entered the planet's gravity well; 'Mdama sent his forces to board the frigate to keep any humans away.<ref>'''Halo 4''', ''[[Terminal/Halo 4|Prologue Terminal "Jul 'Mdama"]]''</ref> As Covenant troops entered the ship, Requiem began to scan the ''Dawn'' for a "[[Reclaimer]]".<ref name="Dawn"/>


In the next two years after the [[Battle of the Citadel|end]] of the Great War in [[2554]], [[Jul 'Mdama]] led his fleet, including ''Song of Retribution'' and at least 3 other assault carriers, to [[Requiem]] in search of the shield world's "treasure": he sought the [[Ur-Didact|Didact]], the leader of the [[Warrior-Servant|Forerunner military]], due to their mutual hatred of humanity.{{Ref/Reuse|jul}} However, 'Mdama could not find a way into Requiem despite every attempt, so the ''Song of Retribution'' held station in orbit.{{Ref/Reuse|song}} On [[2557#July|July 21, 2557]], the Covenant fleet that accompanied ''Retribution'' returned to Requiem via [[Slipstream space|slipspace]] as the ''Dawn'' entered the [[planet]]'s gravity well; 'Mdama sent his forces to board the frigate to keep any humans away.{{Ref/Game|Id=jul|Halo 4|[[Terminal (Halo 4)|Prologue Terminal "Jul 'Mdama"]]}} As his Covenant troops entered the ship, Requiem began to scan the ''Dawn'' for a "[[Reclaimer]]".{{Ref/Reuse|Dawn}}
==History==
 
{{clear|left}}
 
==Battle==
{{Expand-section}}
===Opening skirmishes and Didact's awakening===
===Opening skirmishes and Didact's awakening===
[[File:DidactJohnHM.jpeg|300px|left|thumb|John-117 encounters [[Ancient humanity|Humanity's]] ancient foe, the [[Shadow-of-Sundered-Star|Didact]] for the first time.]]
{{Quote|If you haven't mastered even these primitives, then Man has not attained the [[Mantle]]. Your ascendance may yet be prevented. Time was your ally, human. But now it has abandoned you. The Forerunners... have returned.|The Ur-Didact to John-117, declaring the return of the Forerunners}}
{{Quote|If you haven't mastered even these [[Jul 'Mdama's Covenant|primitives]], then [[Human|Man]] has not attained the [[Mantle]]. Your ascendance may yet be prevented. Time was your ally, human. But now it has abandoned you. The [[Forerunner]]s... have returned.|The [[Ur-Didact]] to [[John-117]], declaring the return of the [[Forerunners]]}}
Cortana awoke John-117 from cryostasis and informed him of intruders on the ''Forward Unto Dawn''. When the duo found out that there was a Covenant fleet around the ''Dawn'' and one of the {{Class|CRS|light cruiser}}s was moving into a intercept course, Cortana instructed John to fire one of ''Dawn'''s missiles at the cruiser. The Spartan battled through the wreckage and managed to destroy the cruiser moments before it fired its energy projector. While on the outer hull, John was scanned by a beam coming from Requiem, which then opened its interior for the Reclaimer. ''Forward Unto Dawn'', along with several Covenant cruisers, was pulled into Requiem's interior.<ref name="Dawn"/>
Cortana awoke John-117 from cryostasis and informed him of intruders on the ''Forward Unto Dawn''. When the duo found out that there was a [[Jul 'Mdama's Covenant|former Covenant]] fleet around the ''Dawn'' and one of the {{Pattern|Zanar|light cruiser}}s was moving into an intercept course, Cortana instructed John to fire one of ''Dawn''{{'}}s missiles at the cruiser. The Spartan battled through the wreckage and managed to destroy the cruiser moments before it fired its energy projector. While on the outer hull, John was scanned by a beam coming from Requiem, which then opened its interior for the Reclaimer. ''Forward Unto Dawn'', along with several Covenant cruisers, were pulled into Requiem's interior. At least one cruiser was destroyed when a piece of wreckage from the ''Dawn'' collided with it as they were drawn into the shield world.{{Ref/Reuse|Dawn}}


John-117 and Cortana survived the fall into Requiem's middle shell. They decided to hijack one of the surviving Covenant ships to return to Earth, where they would be able to find [[Catherine Halsey|Dr. Catherine Halsey]] to assess Cortana's [[rampancy]]. However, {{UNSCShip|Infinity}}, after picking up ''Forward Unto Dawn''{{'}}s distress beacon, was approaching the shield world. While looking for a way to contact ''Infinity'', John and Cortana accidentally triggered Requiem's guardians, the Prometheans.{{Ref/Level|Id=Requiem|Game=Halo 4|Level=[[Requiem (level)|Requiem]]}} The Prometheans attacked the Spartan as well as Jul's Covenant. In an effort the warn ''Infinity'' of Requiem's gravity well, the Spartan-AI team disabled two energy pylons inside [[Core of Requiem|Requiem's core]] in order to eliminate interference emitted from a satellite in the core. When John attempted to contact ''Infinity'' in the satellite, it was revealed that the [[Ur-Didact|Didact]] had purposely manipulated ''Infinity''{{'}}s signal to trick John-117 into releasing him from his [[Cryptum]]. The Didact openly declared war on humanity and resumed control of his mechanized Prometheans; viewing the Didact as a living god, the Covenant forces followed suit.{{Ref/Reuse|Forerunner}}
John-117 and Cortana survived the fall into Requiem's middle shell. They decided to hijack one of the surviving Covenant ships to return to Earth, where they would be able to find [[Catherine Halsey|Dr. Catherine Halsey]] to assess Cortana's [[rampancy]]. However, {{UNSCship|Infinity}} had picked up ''Forward Unto Dawn'''s distress beacon and was approaching the shield world. While looking for a way to contact ''Infinity'', John and Cortana accidentally triggered Requiem's guardians, the Prometheans.<ref>'''Halo 4''', campaign level ''[[Requiem (level)|Requiem]]''</ref> The Prometheans attacked the Spartan as well as the Covenant. In an effort the warn ''Infinity'' of Requiem's gravity well, the Spartan-AI team disabled two energy pylons inside [[Core of Requiem|Requiem's core]] in order to eliminate interference emitted from a satellite in the core. When John attempted to contact ''Infinity'' in the satellite, it was revealed that the [[Ur-Didact|Didact]] had purposely manipulated ''Infinity''<nowiki>'</nowiki>s signal to trick John-117 into releasing him from his [[Cryptum]]. The Didact openly declared war on humanity and reassumed control of his mechanized Prometheans; viewing the Didact as a living god, the Covenant forces followed suit. John escaped Requiem's core just as ''Infinity'' entered Requiem's outer shell.<ref>'''Halo 4''', campaign level ''[[Forerunner (level)|Forerunner]]''</ref>
{{clear|left}}


===''Infinity''{{'}}s arrival===
===''Infinity''<nowiki>'</nowiki>s arrival===
[[File:Commissioning-6.jpg|thumb|300px|Moments after the Forerunner Warrior-Servant leader reawakened, the Didact hacked UNSC ''Infinity''{{'}}s control systems, which caused her to inexorably crash-land on the Requiem's surface and be damaged upon her crashing.]]
{{Quote|[[FLEETCOM]], this is ''Infinity''! We are encountering an unidentifiable gravimetric disturbance and are being pulled ''inside'' a planet of Forerunner origin! Possible contact with the UNSC ''Forward Unto Dawn''!|Andrew Del Rio broadcasting an emergency transmission.}}  
{{Quote|[[FLEETCOM]], this is ''Infinity''! We are encountering an unidentifiable gravimetric disturbance and are being pulled ''inside'' a planet of Forerunner origin! Possible contact with the UNSC ''Forward Unto Dawn''!|Andrew Del Rio broadcasting an emergency transmission.}}  
As the ''Infinity'' and her fleet continued to approach Requiem, the ship's control systems were swiftly hacked by the Didact as Requiem once again opened one of its portals and pulled the ''Infinity'' into the shield world, causing violent explosions inside the supercarrier as her approach went chaotic, with her parked vehicles crashing into one another.{{Ref/Reuse|The Commissioning}} John escaped Requiem's core just as ''Infinity'' entered Requiem's outer shell.{{Ref/Level|Id=Forerunner|Game=Halo 4|Level=[[Forerunner (level)|Forerunner]]}}
''Infinity'' crashed into a jungle inside Requiem and was immediately attacked by Promethean and Covenant forces. During the attack, ''Infinity''<nowiki>'s</nowiki> commanding officer, [[Andrew Del Rio|Captain Andrew Del Rio]], deployed [[UNSC Marine Corps|Marines]] and [[SPARTAN-IV Program|SPARTAN-IVs]] for reconnaissance, believing that the ''Infinity'' would be able to fend off her attackers while providing support for ground forces. The ill-prepared Marines were overwhelmed by the unfamiliar Prometheans and suffered heavy casualties. In addition to losing their landing zones, many [[D79-TC Pelican|Pelican dropships]] were shot down. ''Infinity'' was eventually boarded, allowing the Didact to extract information about the [[Composer]], a Forerunner superweapon, from the ship's mainframe. John-117 joined Commanders [[Thomas Lasky]] and [[Sarah Palmer]] just as Captain Del Rio recalled ground forces to ''Infinity''. John cleared a landing zone for the UNSC forces and headed to ''Infinity''<nowiki>'s</nowiki> crash site. There, John-117 and a squad of SPARTAN-IVs broke through to one of ''Infinity''<nowiki>'s</nowiki> hangar bays. John piloted a [[HRUNTING/YGGDRASIL Mark IX Armor Defense System|Mantis assault mech]] and fought through ''Infinity''<nowiki>'s</nowiki> maintenance corridors to some of the ship's weapon systems. After John destroyed the Covenant jammers near the control terminals, ''Infinity'' disabled two ''CRS''-class light cruisers and damaged the Didact's Cryptum, prompting the Forerunner to retreat.<ref name="Infinity"/> The repaired ''Infinity'' left her crash site, but since she was still under the effect of the Requiem's gravity well, Captain Del Rio sent John-117 and [[Gypsy Company]] to take down the Forerunner anti-air particle cannons near the gravity well generator.<ref name="rec">'''Halo 4''', campaign level ''[[Reclaimer (level)|Reclaimer]]''</ref>


''Infinity'' crashed into a jungle inside Requiem and was immediately attacked by Promethean and Covenant forces. During the attack, ''Infinity''{{'}}s commanding officer, [[Andrew Del Rio|Captain Andrew Del Rio]], deployed [[UNSC Marine Corps|Marines]] and [[SPARTAN-IV Program|SPARTAN-IVs]] for reconnaissance, believing that the ''Infinity'' would be able to fend off her attackers while providing support for ground forces. The ill-prepared Marines were overwhelmed by the unfamiliar Prometheans, and suffered heavy casualties. In addition to losing their landing zones, many [[D79-TC Pelican|Pelican dropships]] were shot down. ''Infinity'' was eventually boarded, allowing the Didact to extract information about the [[Composer]], a Forerunner superweapon, from the ship's mainframe. John-117 joined Commanders [[Thomas Lasky]] and [[Sarah Palmer]] just as Captain Del Rio recalled ground forces to ''Infinity''. John cleared a landing zone for the UNSC forces and headed to ''Infinity''{{'}}s crash site. There, John-117 and a squad of SPARTAN-IVs broke through to one of ''Infinity''{{'}}s hangar bays. John piloted a [[HRUNTING/YGGDRASIL Mark IX Armor Defense System|Mantis assault mech]] and fought through ''Infinity''{{'}}s maintenance corridors to some of the ship's weapon systems, and, after John destroyed the Covenant jammers near the control terminals, ''Infinity'' disabled two ''CRS''-class light cruisers and damaged the Didact's Cryptum, prompting the Forerunner to retreat.{{Ref/Reuse|Infinity}} The repaired ''Infinity'' left her crash site, but since she was still under the effect of Requiem's gravity well, Captain Del Rio sent John-117 and [[Gypsy Company]] to take down the Forerunner anti-air [[particle cannon]]s near the gravity well generator.{{Ref/Level|Id=rec|Game=Halo 4|Level=[[Reclaimer (level)|Reclaimer]]}}
At some point during the battle, at 1604 hours, Cortana conversed with the original shipoard AI of the ''Infinity'', [[Aine]], who was heavily damaged by the time the ''Infinity'' crashed, for a dozen seconds, asking her for help with the ship's crew. However, Aine, noticing Cortana's [[rampancy]] may kill even more of ''Infinity''{{'}}s crew, and the deactivation of her central power core at Cortana's hands, declined. She subsequently threatened her with informing Captain Del Rio to lock Cortana and John-117 on the ship or articulate the [[Unified Earth Government]]'s policy for final dispensation as Cortana continued to ignore advice from Aine. In response, Cortana accidentally broke down Aine's matrix, killing her as a result while the AI believed that Aine could have accepted the opportunity to let Cortana and John-117 help the shipboard AI.{{Ref/Generic|Id=datadrops7|Heading=[[Halo Legendary Crate]]|Subheading=[[Halo Legendary Crate/Data Drops|Data Drop #7]]|Detail=[[:File:LC 07 doc2.jpg|JUNE 21, 2557 1604:02:28 // UNSC INFINITY]]}} The conversation was recorded as the "Cyroraeth Dialogue", and the story of the functional death of Aine was kept a secret to the majority of ''Infinity''{{'}}s crew, believing the former shipboard AI was terminated upon the ''Infinity''{{'}}s impact on Requiem.{{Ref/Generic|Id=TCD|Heading=[[Halo Legendary Crate]]|Subheading=[[Halo Legendary Crate/Data Drops|Data Drop #7]]|Detail=[[:File:LC 07 doc2.jpg|THE CYRORAETH DIALOGUE]]}}
[[File:H4-E3-Campaign-10.jpg|300px|thumb|left|UNSC forces on a mission to destroy Requiem's gravity well.]]
===Assault on the gravity well generator===
===Assault on the gravity well generator===
{{Main|Operation: WHIRLPOOL}}
{{Quote|Priority is to free ''Infinity'' from Requiem's gravity well and file a threat assessment back at FLEETCOM.|Captain Del Rio prioritizing the ''Infinity'''s safety to John-117}}
{{Quote|Priority is to free ''Infinity'' from Requiem's gravity well and file a threat assessment back at FLEETCOM.|Captain Del Rio prioritizing the ''Infinity''{{'}}s safety to John-117}}
Gypsy Company, aboard a [[Mobile Anti-Aircraft Weapons Platform M510 Siegework/Ultra-Heavy|Mammoth]] and led by Commander Lasky, destroyed the first and second anti-air particle cannons. However, a Covenant [[Deployment Platform Type-56 Ground Support/Ultra Heavy|Lich]] heavily damaged the Mammoth. Even though John-117 and a SPARTAN-IV team destroyed the Lich, the Mammoth was forced to stop when it approached a Forerunner structure.<ref name="rec">'''Halo 4''', campaign level ''[[Reclaimer (level)|Reclaimer]]''</ref>
Gypsy Company, aboard a [[Mobile Anti-Aircraft Weapons Platform M510 Siegework/Ultra-Heavy|Mammoth]] led by Commander Lasky, destroyed the first and second anti-air particle cannons. However, a Covenant [[Kmiro'sish-pattern Lich|Lich]] heavily damaged the Mammoth, and even though John-117 and a SPARTAN-IV team destroyed the Lich, the Mammoth was forced to stop when it approached a Forerunner structure.{{Ref/Reuse|rec}}


John entered the structure and, with Cortana's help, disabled the last two anti-air cannons. Cortana suddenly disappeared, prompting John to search the structure for her. He was taken to an archived personality of the [[Librarian]], the Didact's wife, and the one who saved humanity from the [[Halo Array|Halos]]. The Librarian informed John of the Didact's plan to imprison humanity in digital form with the Composer. In doing so, she altered John-117's genes, an action that would prove itself useful when the Didact's forces [[Raid on Ivanoff Station|raided Ivanoff Station]]. John-117 returned to a UNSC convoy led by [[Master Sergeant]] [[Marcus Stacker]] and eventually reached Requiem's gravity well generator. Using targeting data provided by the Spartan, ''Infinity'' destroyed the generator.{{Ref/Reuse|rec}}
John entered the structure and, with Cortana's help, disabled the last two anti-air cannons. Cortana suddenly disappeared, so John searched the structure for her. He was taken to an archived personality of the [[Librarian]], the Didact's wife and the one who saved humanity from the [[Halo Array|Halos]]. The Librarian informed John of the Didact's plan to imprison humanity into digital form with the Composer. In doing so, she altered John-117's genes, an action that would prove itself useful when the Didact's forces [[Raid on Ivanoff Station|raided Ivanoff Station]]. John-117 returned to a UNSC convoy led by [[Master Sergeant]] [[Marcus Stacker]] and eventually reached Requiem's gravity well generator. Using targeting data provided by the Spartan, ''Infinity'' destroyed the generator.<ref name="rec"/>
{{clear|left}}


===The Didact's departure===
===The Didact's departure===
{{Quote|Do you truly believe these theatrics can prevent my departure? Embrace your sad fate and retain your nobility - I am already beyond you.|The Didact to Master Chief{{Ref/Reuse|Shutdown}}}}
{{Quote|Do you truly believe these theatrics can prevent my departure? Embrace your sad fate and retain your nobility - I am already beyond you.|The Didact to Master Chief}}
Following the destruction of the gravity well generator, the Master Chief and Cortana began to push for Captain Del Rio and ''Infinity'' to assault the Didact's Cryptum, and destroy it, to keep the Didact from leaving Requiem. However, Del Rio refused to believe the two, calling their encounter with the Librarian "the hallucinations of an aging Spartan and his malfunctioning AI." This belief was furthered when Cortana's [[rampancy]] caused her to have an angry outburst. While Del Rio ordered Commander Lasky to remove Cortana's data chip to be destroyed, the Master Chief took it instead, telling Del Rio that if he wouldn't stop the Didact, the Master Chief would do it himself. The Master Chief refused Del Rio's orders to stand down, and ordered Lasky to warn Earth of the coming threat from the Didact. Lasky was then ordered to prevent the Master Chief's departure by any means necessary but recognized that it was too dangerous to risk the Chief being wrong about the Didact. Instead, Lasky had a [[G79H-TC Pelican|Pelican gunship]] prepared for full combat pursuit of the Master Chief but instead gave the dropship to the Spartan.{{Ref/Level|Id=Shutdown|H4|[[Shutdown]]}}
Following the destruction of the gravity well generator, the Master Chief and Cortana began to push for Captain Del Rio and ''Infinity'' to assault the Didact's Cryptum and destroy it to keep the Didact from leaving Requiem. However, Del Rio refused to believe the two, calling their encounter with the Librarian "the hallucinations of an aging Spartan and his malfunctioning AI." This was furthered when Cortana's [[rampancy]] caused her to have an angry outburst. While Del Rio ordered Commander Lasky to remove Cortana's data chip to be destroyed, the Master Chief took it instead, telling Del Rio that if he wouldn't stop the Didact, the Master Chief would do it himself. The Master Chief refused Del Rio's orders to stand down and ordered Lasky to warn Earth of the coming threat from the Didact. Lasky was then ordered to prevent the Master Chief's departure by any means necessary but recognized that it was too dangerous to risk the Chief being wrong about the Didact. Instead, Lasky had a [[D79-TC Pelican#Gunship variant|Pelican gunship]] prepared for full combat pursuit of the Master Chief but instead gave the dropship to the Spartan.


[[File:H4-Mantle-Departure.jpg|300px|thumb|Failing to imprison the Forerunner leader any longer, the Didact eventually escapes aboard ''Mantle's Approach'' and began to initiate his vengeful plan to destroy the humanity once and for all.]]
The Master Chief departed ''Infinity'' in the Pelican as ''Infinity'' and her crew made their escape from Requiem. Without ''Infinity's'' firepower to back them up, Cortana suggests instead disrupting the communications at two of the towers near the Didact's Cryptum which would allow her to forge an override code and lower the Didact's shields so they could reach him. Using the Pelican's cannons, the Master Chief was able to destroy the [[Phantom]] dropships guarding each tower and make his way within. Inside each tower, the Master Chief fought his way through determined Covenant and Promethean defenders and used an EMP in one tower to destroy a carrier wave generator and destroyed the attenuators in another tower, giving Cortana the opportunity to lower the Didact's shields. All through this, the Didact telepathically taunted the Master Chief about the futility of his actions.
The Master Chief departed ''Infinity'' in the Pelican, as ''Infinity'' and her crew made their escape from Requiem. Without ''Infinity's'' firepower to back them up, Cortana suggests instead disrupting the communications at two of the towers near the Didact's Cryptum, which would allow her to forge an override code and lower the Didact's shields so they could reach him. Using the Pelican's cannons, the Master Chief was able to destroy the [[Ru'swum-pattern Phantom|Phantom]] dropships guarding each tower and make his way within. Inside each tower, the Master Chief fought his way through 'Mdama's determined Covenant and Promethean defenders, and used an EMP in one tower to destroy a carrier wave generator, and destroyed the attenuators in another tower, giving Cortana the opportunity to lower the Didact's shields. All through this, the Didact telepathically taunted the Master Chief about the futility of his actions.{{Ref/Reuse|Shutdown}}


With the Didact's shields down, Cortana suggested another course of action: reach the tower that controlled the spires surrounding the Didact's Cryptum, and use the controls to encase the Cryptum in the towers to keep it from leaving Requiem. The Master Chief returned to his Pelican gunship and used it to reach the third tower, encountering no further aerial resistance along the way. Inside the tower, the Master Chief came up against a massive force from 'Mdama's Covenant defending both levels of the tower. including two [[Hunter]]s and several [[Sho'riru-pattern Shade|Shade]] turrets and [[Is'belox-pattern Banshee|Banshees]]. The Master Chief was eventually able to reach the control panel where he inserted Cortana, who took control of the tower system. Cortana initially moved the towers to imprison the Didact's Cryptum, but her rampancy got the best of her and she instead dropped the towers.{{Ref/Reuse|Shutdown}}
With the Didact's shields down, Cortana suggested another course of action: reach the tower that controlled the spires surrounding the Didact's Cryptum and use the controls to encase the Cryptum in the towers and keep it from leaving Requiem. The Master Chief returned to his Pelican gunship and used it to reach the third tower, encountering no further aerial resistance along the way. Inside the tower, the Master Chief came up against a massive Covenant force defending both levels of the tower including two [[Hunter]]s and several [[Shade]] turrets and [[Banshee]]s. The Master Chief was eventually able to reach the control panel where he inserted Cortana who took control of the tower system. Cortana initially moved the towers to imprison the Didact's Cryptum, but her rampancy got the best of her and instead she dropped the towers.


Unable to imprison the Didact any longer, the Master Chief decided to move across some nearby [[Kmiro'sish-pattern Lich|Liches]] heading for the Cryptum in order to reach the Didact. However, after he landed on the first Lich, the Cryptum merged with the Forerunner ship ''[[Mantle's Approach]]'' and joined a fleet heading out into space. Unable to stop the Didact from leaving, the Master Chief hitched a ride on the Lich as it followed the Didact's ship into [[slipspace]].{{Ref/Reuse|Shutdown}}
Unable to imprison the Didact any longer, the Master Chief decided to move across some nearby [[Lich]]es heading for the Cryptum to reach the Didact. However, after he landed on the first Lich, the Cryptum merged with the Forerunner ship ''[[Mantle's Approach]]'' and joined a fleet heading out into space. Unable to stop the Didact from leaving, the Master Chief hitched a ride on the Lich as it followed the Didact's ship into [[slipspace]]. <ref name="rec"/>
 
{{clear|right}}


==Aftermath==
==Aftermath==
===Didact's plans===
The Didact would arrive at Ivanoff Station and despite the efforts of the UNSC, he obtained the Composer and digitized everyone on the station excluding John-117, who was saved thanks to genetic augmentations provided by the Librarian. The Didact then set course for Earth, with the intent of digitizing its population, but was ultimately stopped and defeated by John-117. With the ''Infinity'' and the Master Chief gone, Requiem remained under Promethean and Covenant control. The UNSCDF would not return to Requiem until six months later, when the ''Infinity'' was again deployed to the shield world to establish research bases and obtain useful Forerunner technologies.<ref name="SOE1"/>
The Didact would [[Raid on Ivanoff Station|arrive]] at Ivanoff Station and despite the efforts of the UNSC, he obtained the Composer, and digitized practically everyone on the station, excluding John-117 who was saved thanks to genetic augmentations provided by the Librarian.{{Ref/Level|H4|[[Composer (level)|Composer]]}} The Didact then set course for [[Earth]], with the intent of digitizing its population, but was [[New Phoenix Incident|ultimately stopped and defeated]] by John-117.{{Ref/Reuse|Midnight}}
 
===Requiem===
With the ''Infinity'' and the Master Chief gone, Requiem remained under Promethean and 'Mdama's Covenant control. After leaving Requiem, Captain Del Rio was relieved of duty by the UNSC Security Council due to his decision to leave the Master Chief on Requiem, and Commander Lasky was promoted to captain of the ''Infinity''.{{Ref/Reuse|Midnight}}
 
The UNSC would not return to Requiem until six months later, when the ''Infinity'' was again deployed to the shield world to establish research bases and obtain useful Forerunner technologies, resulting in a [[Requiem Campaign|larger-scale but indecisive battle]] against Prometheans and Jul 'Mdama's Covenant, which led to the eventual destruction of Requiem along with the rest of the [[Epoloch system]].{{Ref/Reuse|SOE1}}
 
==Participants==
{{Col-begin}}
{{Col-2}}
===UEG===
====Naval assets====
=====Starships=====
{| class="wikitable sortable " style="width: 75%;" cellspacing="1" cellpadding="1" border="0"
|-
! Tactical grouping
! Class
! Name
! Status<!--This refers to their status after the battle, not their overall status-->
|-
| rowspan="2" |Unknown
|{{Class|Charon|light frigate}}
|{{UNSCShip|Forward Unto Dawn}}{{Ref/Reuse|Dawn}} {{c|aft half}}
|Destroyed
|-
|{{Class|Infinity|supercarrier}}
|{{UNSCShip|Infinity}}{{Ref/Reuse|Forerunner}}
|Survived
|}
====Military Personnel====
{| class="wikitable sortable " style="width: 75%;" cellspacing="1" cellpadding="1" border="0"
|-
! Branch
! Rank
! Name
! Status<!--This refers to their status after the battle, not their overall status-->
|-
| rowspan="3" |[[UNSC Navy]]
|[[Master Chief Petty Officer]]
|[[John-117]]{{Ref/Reuse|Dawn}}
|Survived
|-
|[[Captain (NAVCOM)|Captain]]
|[[Andrew Del Rio]]{{Ref/Reuse|Infinity}}
|Survived
|-
|[[Commander]]
|[[Thomas Lasky]]{{Ref/Reuse|Infinity}}
|Survived
|-
| rowspan="4" |[[UNSC Marine Corps]]
|[[Master Sergeant]]
|[[Marcus Stacker]]{{Ref/Reuse|rec}}
|Unknown
|-
|[[Staff Sergeant]]
|[[Elena Bobrov]]{{Ref/Reuse|rec}}
|Survived
|-
|[[Sergeant]]
|[[Carlo Scudieri]]{{Ref/Reuse|rec}}
|Unknown
|-
| rowspan="1" |Unknown
|[[Paolo Jiminez]]{{Ref/Reuse|Infinity}}
|KIA
|-
| rowspan="1" |[[Spartan Operations]]
|[[Spartan Commander]]
|[[Sarah Palmer]]{{Ref/Reuse|Infinity}}
|Survived
|}
 
====Units====
=====Ground forces=====
*[[Spartan Operations]]
**[[Fireteam Shadow]]
*[[UNSC Navy]]
*[[UNSC Marine Corps]]
**[[Bulldogs]]
**[[Gypsy Company]]
**[[Shadow Company]]
**[[Castle Company]]
 
====Vehicles====
*[[M808C Scorpion]]
**''[[0383]]''
*[[D79-TC Pelican]]
**''[[Pelican 595]]''
**''[[Papa Foxtrot 766]]
===Artificial intelligence===
{{Main|Artificial intelligence}}
{| class="wikitable sortable " style="width: 75%;" cellspacing="1" cellpadding="1" border="0"
|-
! Name
! Status<!--This refers to their status after the battle, not their overall status-->
|-
|[[Cortana]]{{Ref/Reuse|Dawn}}
|Survived
|-
|[[Aine]]{{Ref/Reuse|datadrops7}}
|KIA
|}
 
{{Col-2}}
===Jul 'Mdama's Covenant===
====Naval assets====
=====Starships=====
{| class="wikitable sortable " style="width: 75%;" cellspacing="1" cellpadding="1" border="0"
|-
! Tactical grouping
! Class
! Name
! Status<!--This refers to their status after the battle, not their overall status-->
|-
|Unknown
|{{Class|CAS|assault carrier}}
|''[[Song of Retribution]]''{{Ref/Reuse|song}}
|Survived
|}
====Military Personnel====
{| class="wikitable sortable " style="width: 75%;" cellspacing="1" cellpadding="1" border="0"
|-
! Rank
! Name
! Status<!--This refers to their status after the battle, not their overall status-->
|-
|[[Supreme Commander]]
|[[Jul 'Mdama]]{{Ref/Reuse|jul}}
|Survived
|-
|[[Shipmaster]]
|[[Ryn 'Alun]]
|Survived
|}
{{Col-end}}


==Gallery==
==Gallery==
<gallery>
<gallery>
File:Covenant fleet surrounding FUD.jpg|'Mdama's Covenant vessels intercepting the UNSC ''Forward Unto Dawn''{{'}}s wreckage in ''[[Halo 4]]''.
File:Covenant fleet surrounding FUD.jpg|Covenant vessels intercepting the UNSC ''Forward Unto Dawn'''s wreckage.
File:H4 campaign dawn.jpeg|Jul 'Mdama's Covenant boarding the ''Forward Unto Dawn''.
File:H4 campaign dawn.jpeg|The Covenant boarding the ''Forward Unto Dawn''.
File:2821570-gallery.jpg|John-117 fighting Promethean constructs inside Requiem.
File:2821570-gallery.jpg|John-117 fighting Promethean constructs inside Requiem.
File:HTMCC-H4 ThisTombIsNowYours.png|John encountering the Ur-Didact for the first time.
File:H4 John-117 Didact first encounter.jpg|John encountering the Ur-Didact for the first time.
File:H4-E3-Campaign-4.jpg|The UNSC ''Infinity'' is pulled inside Requiem.
File:H4-E3-Campaign-4.jpg|The UNSC ''Infinity'' is pulled inside Requiem.
File:H4-E3-Campaign-6.jpg|'Mdama's Covenant forces converge toward the ''Infinity''{{'}}s crash site.
File:H4-E3-Campaign-6.jpg|Covenant forces converge towards ''Infinity'''s crash site.
File:H4 - Campaign Infinity 04.jpg|The Chief leads the Spartan-IVs to retake the crash site.
File:H4 - Campaign Infinity 04.jpg|The Chief leads the Spartan-IVs to retake the crash site.
File:H4-E3-Campaign-8.jpg|Gypsy Company is deployed.
File:H4-E3-Campaign-8.jpg|Gypsy Company is deployed.
File:H4-E3-Campaign-10.jpg|UNSC forces on a mission to destroy Requiem's gravity well.
File:H4-Shutdown.jpg|John and Cortana stay on Requiem to stop the Didact.
File:H4-Shutdown.jpg|John and Cortana stay on Requiem to stop the Didact.
File:H4-Mantle-Departure.jpg|The Didact eventually escapes aboard ''Mantle's Approach''.
</gallery>
</gallery>


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*''[[Halo 4]]''
*''[[Halo 4]]''
**''[[Terminal (Halo 4)|Terminals]]''
**''[[Terminal/Halo 4|Terminals]]''
**''[[Spartan Ops]]'' {{Mo}}
**''[[Spartan Ops]]'' {{Mo}}
*''[[Halo: Escalation]]''
*''[[Halo: Escalation]]''
*''[[Halo 5: Guardians]]'' {{Mo}}
*''[[Halo 5: Guardians]]'' {{Mo}}
*''[[Halo Mythos]]''
*''[[Halo Mythos: A Guide to the Story of Halo]]''
*''[[Halo: Fractures]]''
**''[[Rossbach's World (story)|Rossbach's World]]'' {{Mo}}
*''[[Halo: Sunrise on Sanghelios]]'' {{Mo}}
*''[[Halo: Trial of Reckoning]]'' {{Mo}}
*''[[Halo: Epitaph]]'' {{Mo}}
 
==Notes==
{{Ref/Notes}}
 
==Sources==
==Sources==
{{Ref/Sources}}
<references/>


{{Post-Covenant War conflicts}}
{{Post-Covenant War conflicts}}
[[Category:Jul 'Mdama's Covenant victories]]
{{DEFAULTSORT:Requiem}}

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