Editing Requiem Campaign

{{Status|Canon}}
{{Battle infobox
|name=Requiem Campaign
|prev=[[Assassination of Avu Med 'Telcam]]
|next=[[Attack on Ealen IV]]
|image=[[File:HM-Requiem Campaign.jpg|300px]]
|conflict=*[[Post-Covenant War conflicts]]
**[[Blooding Years]]
|date=[[2558#February|February 7]] – Before [[2558#March|March 3, 2558]]{{Ref/Comic|Id=HE1|HE|Issue=1}}
|place=[[Requiem]], [[Epoloch system]]
|result='''Indecisive'''
*Requiem damaged, but moved.{{Ref/Novel|Id=Graveworld|Halo: Graveworld}}
*Epoloch system destroyed.
*Remaining Covenant vessels and UNSC ''Infinity'' escape.
*Each side acquires a separate half of the [[Janus Key]].
*Doctor Halsey defects to Jul 'Mdama's Covenant.
*The [[Librarian]]'s [[mind transfer|imprint]] sent to the [[Absolute Record]].
|side1=*{{Icon|UEG}} [[Unified Earth Government]]
**{{Icon|UNSC Post}} [[United Nations Space Command]] 
*{{Icon|SoS}} [[Swords of Sanghelios]]{{Ref/Novel|Id=stillmidnight|Halo: Still Midnight}}
*{{Icon|Forerunner}} [[Librarian#The Janus Key and the Absolute Record|Librarian Imprint's]] [[Sentinel]]s
|side2=*{{Icon|Didact}} [[Didact|Didact's]] [[Prometheans#Mechanical Prometheans|Prometheans]]
*{{Icon|Mdama}} [[Jul 'Mdama's Covenant]]
|commanders1=*[[Captain (Navy)|CAPT]] [[Thomas Lasky]]
*CAPT [[Cyrus Shaw]]
*[[Spartan Commander]] [[Sarah Palmer]]
*[[Librarian#The Janus Key and the Absolute Record|Librarian]]
|commanders2= *[[Supreme Commander]] [[Jul 'Mdama]]
*[[Commander (Covenant)|Commander]] [[Gek 'Lhar]]†
*[[Sangheili Warrior|Warrior]] [[Parg Vol]]†
|forces1=*[[Expeditionary Strike Group 1]]
**{{UNSCShip|Infinity}}
***10 internally docked {{Class|Strident|heavy frigate}}s
**3+ {{Class|Vindication|light battleship}}s{{Ref/Reuse|key}}
**[[F-41 Broadsword]]s
**{{Pattern|Elsedda|Banshee}}s{{Ref/Reuse|stillmidnight}}
**[[D79H Pelican]]s
***[[G79H Pelican]]s
**Numerous stolen {{Pattern|Ru'swum|Phantom}}s
**[[M808C Scorpion]]s
**[[Mantis]]es
**[[M12G1 Gauss Warthog]]s
**[[M12R Rocket Warthog]]s
**[[M12 Chaingun Warthog]]s
**[[M274R Mongoose]]s
**~300 [[SPARTAN-IV program|Spartan-IV]]s
**[[UNSC Marine Corps|Marine Corps]] expeditionary personnel
**[[UNSC Army|Army]] expeditionary personnel
**[[UNSC Air Force|Air Force]] expeditionary forces
**[[Aggressor Sentinel]]s {{c|under [[Librarian]]'s influence}}
|forces2=
*Jul's Covenant fleet
**1+ {{Class|CAS|assault carrier}}
**2+ {{Pattern|Maugen|armored cruiser}}s
**Numerous {{Pattern|Zanar|light cruiser}}s
**1+ {{Pattern|Kmiro'sish|Lich}}
**Numerous {{Pattern|Ru'swum|Phantom}}s
**Numerous {{Pattern|Morsam|Seraph}}s
**Numerous {{Pattern|Is'belox|Banshee}}s
**1+ {{Pattern|Za'zayara|Harvester}}
**Numerous {{Pattern|Zurdo|Wraith}}s
**Numerous {{Pattern|Karo'etba|Ghost}}s
**Numerous [[Sangheili]]
**Numerous [[Unggoy]]
**Numerous [[Kig-Yar]]
**Numerous [[Lekgolo]]
**1+ {{Pattern|Bkowe'nei|Vampire}}{{Ref/Reuse|stillmidnight}}
*Thousands of Promethean infantry
**[[Promethean Crawler]]s
**[[Promethean Knight]]s
**[[Promethean Watcher]]s
|casual1=*At least 11 SPARTAN-IVs
**[[Fireteam Castle]]
**[[Cara Costabile]]
**[[Mountain Squad]]
*Many Marines
**[[Boa Squad]]
**[[Hawk Squad]]
*Many Army troopers
*At least [[Ryan Frank|one]] Air Force pilot 
*All Aggressor Sentinels
*3+ [[D79H Pelican|Pelicans]]
*1+ captured {{Pattern|Ru'swum|Phantom}} {{c|friendly fire}}
|casual2=*Many Promethean forces
*Many Covenant forces
**[[Parg Vol]]
**[[Gek 'Lhar]]
**Heavy infantry losses
**1+ {{Pattern|Maugen|armored cruiser}}
**Several {{Pattern|Zanar|light cruiser}}s
**Numerous {{Pattern|Ru'swum|Phantom}}s
**Numerous {{Pattern|Zurdo|Wraith}}s
**Numerous {{Pattern|Karo'etba|Ghost}}s
**1+ {{Pattern|Kmiro'sish|Lich}}
**1 {{Pattern|Za'zayara|Harvester}}
}}
{{Quote|The [[Jul 'Mdama's Covenant|Covies]]... they believe this is the home of [[Ur-Didact|one]] of [[Forerunner|their gods]]! Way I see it, if those freaks wanna meet God, it's our duty to help them along!|Sarah Palmer discussing Jul 'Mdama's Covenant presence on Requiem with the SPARTAN-IVs}}

The '''Requiem Campaign''',{{Ref/Comic|Id=esc|HE|Issue=13}} also known as the '''Second Battle of Requiem'''{{Ref/Site|URL=https://www.halowaypoint.com/en-us/universe/characters/henry-glassman|Site=Halo Waypoint|Page=Henry Glassman|D=13|M=04|Y=2016}} or the '''Requiem Conflict''',{{Ref/Site|URL=https://www.halowaypoint.com/en-us/universe/characters/tedra-grant|Site=Halo Waypoint|Page=Tedra Grant|D=13|M=04|Y=2016}} was the second, larger-scale [[battle|engagement]] fought on the [[Forerunner]] [[shield world]] [[Requiem]] in [[2558#February|February 2558]]. It was waged between the [[Promethean]]s and their [[Jul 'Mdama's Covenant]] religious followers and the returning [[United Nations Space Command]].

==Background==
{{Main|Battle of Requiem}}
Six months before the onset of the battle in [[2557#July|July 2557]], the [[Forerunner]] [[Promethean]] supreme commander known as the [[Ur-Didact|Didact]] had been inadvertently awakened from his [[Cryptum]] on Requiem and immediately initiated a campaign against humanity, which he saw as unworthy of taking on the [[Mantle]]. Revering the Forerunner as a living god, a [[Jul 'Mdama's Covenant|new "Covenant" faction]] under the leadership of [[Jul 'Mdama]], allied themselves with the Didact and his mechanical Promethean armies. The Didact was eventually [[New Phoenix Incident|defeated]] by [[SPARTAN-II program|Spartan]] [[John-117]] above [[Earth]], leaving the Prometheans without a leader, yet still hostile to humanity.

As the UNSC recovered from the attack on New Phoenix, Jul 'Mdama retained some control over the Prometheans and Requiem thanks to his alliance with the Forerunner Commander. As the Didact's Hand, Jul 'Mdama used his newfound authority to push aside any and all competing Sangheili warlords, manging to sway a significant number of formerly neutral Sangheili colonies to his side as Jul made preparations for a push for Sanghelios itself, hoping to take it from the Arbiter.{{Ref/Book|Id=Mythos|Mythos}}

With his Covenant now involved in several conflicts, Jul finally turned his attention to Requiem and prepared to return to the [[Shield World]] in full force, not only to pillage Requiem for weapons and technology, but use it to draw humanity into a fatal trap. The Covenant supreme commander leaked word of his plans for Requiem to human intelligence services, and prepared to draw the UNSC into a grinding war of attrition. Jul also seeked to use the war against the UNSC to cement his hold over his newfound Covenant, while also allowing him the opportunitu to sacrifice those whose loyalty was suspect. As a result, the {{UNSCShip|Infinity}}, the most advanced warship in the [[UNSC Navy|Navy]], was dispatched to establish research facilities on the Forerunner construct and eliminate any opposition from the occupying Promethean and 'Mdama's Covenant forces.{{Ref/Reuse|Mythos}}{{Ref/SpOps|Id=s1e1|Departure}}

==Battle==
===''Infinity's'' return===
In [[2558#February|February 2558]], the {{UNSCShip|Infinity}} returned to Requiem, destroying an {{Pattern|Maugen|armored cruiser}} immediately upon arrival. {{Class|Strident|heavy frigate}}s were deployed to protect the ship and establish a position in orbit. SPARTAN-IV fireteams were sent into Requiem to support the Marine, Army, and Air Force assets deployed within the shield world.{{Ref/Reuse|s1e1}} UNSC forces set up several research bases: [[Copernicus Base]], [[Galileo Base]], and [[Magma Base]]. Other locations, such as areas designated "[[Quarry]]", "[[Fortress (location)|Fortress]]", and "[[Sniper Alley]]", were often contested for control.

[[Fireteam Crimson]] would discover one of the three [[Requiem slipspace artifacts]] on Requiem at a Covenant archaeological dig site in "[[the Cauldron]]". At the same time, Fireteam Castle would clear air defenses to allow Crimson's artifact to be retrieved.{{Ref/SpOps|Departure|Core}} The G79H Pelican ''[[Romeo 41]]'' would extract the artifact, though the Covenant would attempt to intercept the dropship with Banshees, Phantoms and a [[Vampire]]. Together with [[Accord Wing]], ''Romeo 41'' would deliver the artifact to the ship{{Ref/Reuse|stillmidnight}} where it was examined by [[Henry Glassman]].{{Ref/SpOps|Id=s1e2|Artifact (Spartan Ops)|EpisodeLinkText=Artifact}} 

Glassman, who accidentally activated it, was translocated to Requiem and became a prisoner of 'Mdama's Covenant. There, he was brought to Jul 'Mdama and was forced to find a method to activate the device containing the Librarian AI in "[[Librarian's Rest]]". Captain Lasky requested Doctor [[Catherine Halsey]] to be brought onboard ''Infinity'' to study the artifact. Halsey found out that the artifact was communicating with the ship's system's, notably the engine, and transmitting signal to a location in Requiem. On Requiem, Sangheili terrorist [[Parg Vol]], an associate of 'Mdama, was hunted and eventually [[Assassination of Parg Vol|assassinated]] by Fireteam Crimson. During [[Skirmish at Two Giants|another engagement]], a {{Pattern|Zanar|light cruiser}} was destroyed by ''[[Infinity Sub-Vessel 3]]'' while it was meeting Crimson who were investigating a Forerunner structure at "[[Two Giants]]".{{Ref/SpOps|Id=s1e3|Catherine}}

===Jul 'Mdama's plan===
During their flight to [[Copernicus Base]], [[Fireteam Castle]] was shot down by Covenant forces led by Jul 'Mdama. This attack drew ''Infinity's'' attention to hunt down 'Mdama. UNSC scientists had discovered that 'Mdama's Covenant were using Requiem's portal systems, and Fireteam Crimson was deployed to assist in the investigation. Incidentally, 'Mdama was detected traversing through the portals, so Fireteam Majestic and Crimson were sent to give chase. After discovering a way to activate Requiem's portal systems, Crimson followed 'Mdama to "the Cauldron", where he purposely left an artifact known as the "[[Didact's Gift]]" for Crimson, prompting the team to bring the artifact to [[Galileo Base]].{{Ref/SpOps|Id=s1e4|Didact's Hand}}
[[File:Majestic - 3.png|thumb|250px|left|Fireteam Majestic recovering the "Didact's Gift" from Galileo Base.]]
Jul 'Mdama's Covenant then staged [[Battle of Galileo Base|an attack]] on the base to show that they were attempting to recover the artifact. While Fireteam Crimson defended the base, Fireteam Majestic extracted "the [[Didact's Gift]]" and brought it back to ''Infinity'', where it was analyzed by Halsey. By giving Halsey the "soul of a Promethean Knight", 'Mdama had gained Halsey's interest in cooperating to find the Librarian. Their partnership, however, was discovered by Captain Lasky and Commander Palmer, who then took Halsey into custody. Spartan [[Gabriel Thorne]], during his examination of the artifact, was taken to Requiem like Glassman. On Requiem, 'Mdama's Covenant and Promethean forces [[Battle at The Refuge|attacked]] UNSC research bases "[[The Refuge (Requiem location)|the Refuge]]" and Magma Base, but both of these attacks were successfully repelled by [[Fireteam Crimson]] with the assistance of [[Fireteam Shadow]] in "the Refuge," resulting in the destruction of another cruiser. Additionally, the UNSC gained vital intelligence on Requiem's portal system and was able to control it before Crimson destroyed a device at "the Refuge" that allowed the portals to open in order to limit the movement of 'Mdama's Covenant and Prometheans. During their search for Spartan Gabriel Thorne in the Quarry, members of Crimson were captured by 'Mdama's Covenant forces.{{Ref/SpOps|Id=s1e5|Memento Mori}}

Spartan Thorne was captured by Jul 'Mdama's Covenant and was brought to where Glassman was. Glassman, on the other hand, managed to activate the Librarian's device, and used the opportunity to escape. Glassman's escape distracted the Sangheili who took Thorne prisoner, giving Thorne the chance to retaliate. Together, the duo ran away, heading for Galileo Base, being chased by a vengeful [[Gek 'Lhar]]. At the same time, Fireteam Crimson also [[Escape from Lockup|escaped]] 'Mdama's Covenant and hijacked a Phantom in the process. Using the captured Phantom, Crimson was able to infiltrate Covenant bases [[First Raid on Control|at]] "[[Control]]" [[Raid on the Warrens|and]] the "[[Warrens]]" where they hacked into 'Mdama's Covenant systems and uncovered vital intel on a nearby Covenant supply depo and [[Harvester (location)|an archeological dig]]. Crimson [[Raid on Cyclone|attacked]] and destroyed the supply depot at "[[Cyclone]]," discovering in the process [[HAVOK tactical nuclear weapon|HAVOK nuclear missiles]] missing their warheads while [[Fireteam Switchback]] was sent to disable a  [[Za'zayara-pattern Harvester|Harvester]] at the archeological dig site. After Switchback disappeared, Crimson was sent to [[Raid on Harvester|investigate and ensure that the Harvester was permanently disabled]]. Crimson only found Switchback's blank [[IFF]] tags and destroyed two consoles aboard the Harvester to ensure its permanent disabling.{{Ref/SpOps|Id=s1e6|Scattered}}

===Second attack on the ''Infinity''===
{{Main|Invasion of the UNSC Infinity}}
[[File:Infinity - Prometheans.png|thumb|250px|left|Promethean Knights boarding ''Infinity'']]
Meanwhile, as Dr. Halsey sat in the brig of the {{UNSCShip|Infinity}}, Roland appeared and asked why she attempted to communicate with an unknown intelligence about classified material. After a brief interchange, Halsey used the passphrase override "undid iridium" to gain control of the AI and then use him to move unsuspected to the captain's ready room. Once there she perused all the material she could find for information on the Librarian and Jul 'Mdama, also discovering that [[John-117]] was still alive and had survived the [[Battle of Installation 00|destruction]] of [[Installation 00]]. She then used the terminal to communicate with Jul 'Mdama. She offered her assistance in exchange for what they both wanted: the Librarian's secrets. At that moment, though, Roland regained control of his confused matrices, pulled the plug, and immediately alerted Lasky. Just as the captain was about to have Halsey interred in a [[cryo chamber|cryo tube]], alarms sounded across the ship: the Prometheans had gained access to the ''Infinity'' and taken all hands by surprise. Most Spartan and Marine fireteams were deployed on Requiem and the Prometheans quickly overran most of the ship. All UNSC assets were recalled to the ship, but at that moment the rest of 'Mdama's Covenant fleet arrived, composed primarily of {{Pattern|Zanar|light cruiser}}s, and attacked the ''Infinity''.{{Ref/SpOps|Id=SO7|Invasion (Spartan Ops)|EpisodeLinkText=Invasion}}

At this point, Fireteam Crimson reached the battle, still in the captured Phantom. ''Infinity's'' automated point-defense turrets could not differentiate between the thousands of incoming enemy spacecraft and Crimson was hit. Lieutenant Murphy barely guided the out-of-control dropship into one of ''Infinity's'' hangars, the bay's vacuum shields decelerating the dropship enough to allow all of its passengers to survive. Fireteam Crimson promptly went to work, clearing the hangar. However, interference from the artifact prevented Roland from closing the bay doors so Crimson was forced to power cycle the Server Room and reboot the ship-wide data link before the hanger bay could be fully secured. At that moment though, teams on board made two discoveries: Jul 'Mdama's Covenant had internally disabled the all port defenses, leaving ''Infinity'' open to attacks from 'Mdama's Covenant fleet, and that 'Mdama's Covenant had stolen UNSC [[HAVOK tactical nuclear weapon]]s and had armed the warheads in the Server Room and the Engine Room. Despite 'Mdama's Covenant protecting the warheads with [[active camouflage]], Fireteam Crimson, managed to disarm all [[seven]] and secure both rooms. With the nukes disarmed and back in UNSC control, Crimson reactivated the ship's port defenses, which promptly destroyed all adjacent ships, including at least one light cruiser. The remainder of 'Mdama's Covenant fleet fled as the UNSC regrouped and repelled the remaining boarders.{{Ref/Reuse|SO7}} But the ''Infinity'' was not safe yet. As Lasky escorted Halsey to the bridge, it was brought to his attention that ''Infinity'' was unable to move from its current spot because it was trapped by [[interdiction web|a sort of Slipspace anchor]]. As he turned his back, a Promethean Knight appeared, knocked Commander Palmer to the deck, grabbed Dr. Halsey, and disappeared again.{{Ref/SpOps|Id=SO8|Expendable}}

[[File:Majestic - 4.jpg|thumb|250px|left|Fireteam Majestic arrive in time to save Thorne and Glassman.]]
As the massive battle waged hundreds of miles over their heads, Spartan Thorne and Dr. Glassman [[Escape from Librarian's Rest|trekked]] through the dusty canyons near "[[Sniper Alley]]" to reach [[Galileo Base]]. Glassman sat down to take a rest and Thorne stopped to glance around. Realizing that something was amiss, he told Glassman to get to safety just as [[Gek 'Lhar]] emerged from invisibility, swinging his energy sword and slicing Thorne's Storm Rifle in half. Gek tossed Glassman aside like a ragdoll and attempted to truncate Thorne, who disarmed him in the process. Thorne managed to knock the Elite assassin to the ground. The Spartan then tried to break Gek's skull with a boulder, but the Elite caught it, flipped Thorne to the ground and brought the stone down on his chest and head, stunning him. Glassman was attempting to reach the fallen energy sword, but was stopped when Gek stepped on his outstretched arm, breaking it. Just as the Elite was preparing to execute the downed Spartan, he was shot in the head three times by DeMarco, who had shown up with the rest of Majestic. The Spartans looted his body, taking Gek's [[Type-1 energy sword|energy sword]] and [[active camouflage]] module before [[Madsen]] located a map of Requiem.{{Ref/Reuse|SO8}}

===Disrupting Covenant Operations===
Following the end of the attack on the {{UNSCShip|Infinity}}, the human forces were redeployed to continue disrupting 'Mdama's Covenant operations on the planet. Having been interrupted in [[Skirmish at Apex|their mission]] to deactivate the portals at "[[Apex]]" and capture the site by the attack on the ''Infinity'',{{Ref/SpOps|Expendable|Backup}} [[Fireteam Crimson]] were [[Raid on Apex|sent back]] to "Apex" to complete their original mission and secure the area. Crimson succeeded in closing the portals and ''Infinity'' sent [[Fireteam Lancer]] to hold "Apex". In addition, Spartan [[Jared Miller]] picked up an SOS coming over 'Mdama's Covenant frequencies in Morse code.{{Ref/SpOps|Expendable|Unfinished Business}} Getting a distress call from [[Fireteam Majestic]], Crimson and [[Fireteam Kodiak]] were sent to "[[Cyclone]]" to [[Assault on Cyclone|take down]] three Covenant [[Ra'aam-pattern burst cannon|plasma artilleries]] stationed there that Majestic was under fire from. During the mission, 'Mdama's Covenant displayed an inexplicable ability to predict the UNSC's movements.{{Ref/SpOps|Expendable|Majestic Rescue}}

With Fireteam Lancer having discovered a nest occupied by Jul 'Mdama's Covenant in the "[[Warrens]]" near "Apex," Crimson was sent to aid Lancer in [[Assault on the Warrens|taking out the Covenant position]]. Fighting through 'Mdama's Covenant base, the SOS was detected again and Crimson followed it to the imprisoned [[Fireteam Switchback]] who had mysteriously vanished while disrupting [[Harvester (location)|one of 'Mdama's Covenant dig sites]]. Crimson and Lancer rescued Switchback while elsewhere [[Poker Squad]] captured a wounded [[Sangheili]] who offered up the location of one of 'Mdama's Covenant listening posts in exchange for his own life. After extracting Crimson and Switchback, [[Sarah Palmer]] ordered Crimson redeployed to destroy the listening post.{{Ref/Reuse|lancer}} Crimson returned to "[[Lockup]]" where the Sangheili revealed 'Mdama's Covenant listening post was. [[Raid on Lockup|Fighting]] their way through 'Mdama's Covenant forces stationed there, Crimson discovered a captured [[UNSC Army|Army]] [[D79H Pelican|Pelican]] that had been shot down in "[[the Cauldron]]" and thought destroyed. 'Mdama's Covenant were able to tap into the Pelican's communications systems and use them to spy on UNSC comm traffic, explaining their inexplicable ability to predict the UNSC's movements. Crimson deactivated the energy tethers hooked into the Pelican's communications systems and [[Robert Dalton]] conducted an orbital strike on the Pelican, destroying it and permanently depriving the Covenant of their ability to spy on the ''Infinity's'' communications with her forces.{{Ref/SpOps|Expendable|Crystal Ball}}

Believing that the map [[Anthony Madsen]] had recovered from [[Gek 'Lhar]] could hold the key to freeing ''Infinity'' from Requiem, Dr. [[Henry Glassman]] had Crimson [[Second Raid on Control|redeployed]] to "[[Control]]" to test his ability to read the map. Glassman guided the fireteam in activating Forerunner heavy weapon caches, [[Z-510 focus turret|beam turrets]] and [[Z-8250 heavy artillery|anti-aircraft guns]]. With the help of the activated defenses, Crimson destroyed several [[Ru'swum-pattern Phantom|Phantoms]] and wiped out 'Mdama's Covenant forces in the area, proving Glassman's interpretation of the map to be correct.{{Ref/SpOps|Expendable|Glassman}} Shortly thereafter, Glassman, still on Requiem with Fireteam Majestic, was extracted back to ''Infinity'' by a Pelican.{{Ref/Reuse|key}}

===The Janus Key and Halsey===
[[File:HTMCC-H4 SO JanusKeyDisplay.png|thumb|250px|left|Dr. Catherine Halsey meets the Librarian in the shrine at "Librarian's Rest".]]
With the abduction of Dr. [[Catherine Halsey]] by enemy forces, [[Admiral]] [[Serin Osman]], head of the [[Office of Naval Intelligence]], ordered Lasky to assassinate the doctor before 'Mdama's Covenant could glean any sensitive intel from her. Sarah Palmer was deployed from ''Infinity'' despite Lasky's admonishments to the contrary. As soon as she was out of earshot, Lasky contacted [[Fireteam Majestic]] and asked them to rescue Dr. Halsey without telling them that Palmer was en route. The Spartans returned to 'Mdama's Covenant's base and [[Skirmish at Librarian's Rest|engaged]] the sentries outside while Thorne used his recently-acquired cloaking unit to slip inside. At the same time, Dr. Halsey unlocked the shield set up by Glassman and entered the Librarian's shrine. Inside she was greeted by the [[Librarian]]'s [[mind transfer|imprint]], which presented to her the two pieces of the [[Janus Key]], an artifact that would reveal the location of every piece of Forerunner technology in the galaxy. Once she reappeared outside the shrine, Jul 'Mdama snatched one of the halves away from her, not noticing the second piece in Halsey's hand. At that moment Thorne broke a nearby sentry's back, killing the other with his assault rifle. Halsey tossed the other half of the Janus Key to Thorne. Just as a sword-wielding warrior was about to kill him from behind, it was felled by Palmer. A pair of Promethean Knights appeared to protect 'Mdama and Halsey, but not before Palmer shot the doctor in the left shoulder. The rest of Majestic appeared and fought through the army of Prometheans alongside Palmer. Before they could reach the cornered 'Mdama, a Knight appeared and teleported away with him and the injured doctor.{{Ref/SpOps|Id=key|Key}}

Following Halsey's abduction, ''Infinity'' dispatched all fireteams from both ''Infinity'' itself and three {{Class|Vindication|light battleship}}s to search for her. [[Fireteam Crimson]] was [[Battle of Cyclone|dispatched]] to "[[Cyclone]]" where Halsey had been routing communications through the area before she was snatched. With the help of beam turrets and [[Aggressor Sentinel]]s under the Librarian's control, Crimson was able to access 'Mdama's Covenant data terminal with the Librarian aiding Roland and Dr. [[Lani Truman]] with the decryption as she prepared to transmit herself to the [[Absolute Record]]. Both the decryption and transmission became stalled at 99%, resulting in Crimson opening the breaker on the power source in the area. The Librarian's imprint was broadcast to the Absolute Record in the form of a massive data stream while Halsey's signal was determined to have bounced to "[[Control]]".{{Ref/SpOps|Id=tsfh|Key|The Search for Halsey}} At "Control", where [[Boa Squad]] had been wiped out by 'Mdama's Covenant, Crimson fought off the occupying forces and activated the comm terminals in the area. 'Mdama's Covenant received backup in the form of Prometheans, but Crimson was able to hold them off long enough for Roland to determine that the signal next bounced to "[[Apex]]". Once Crimson got to a safe location, [[Robert Dalton]] commenced an aerial bombardment of "Control," wiping out the remaining Promethean forces.{{Ref/SpOps|Key|Clean Up}} At "Apex," Crimson discovered the area protected by multiple Covenant shields and heavily fortified by infantry troops supported by [[Ru'swum-pattern Phantom|Phantoms]]. Using [[M808C Scorpion|Scorpion tanks]], Crimson fought through the occupying forces of 'Mdama's Covenant and Prometheans, allowing Roland to determine the signal next bounced to "[[Lockup]]".{{Ref/SpOps|Key|Science Mountain}}

When Crimson arrived at "Lockup," they faced off against Jul 'Mdama's fierce resistance including Ghosts, Wraiths and Hunters. Following the signal being emanated by [[IFF]] tags, Crimson fell into 'Mdama's Covenant trap, but managed to fight their way out of it. Crimson succeeded in clearing the area, but 'Mdama's Covenant and Prometheans sent further reinforcements to "Lockup".{{Ref/SpOps|Key|Revenge}} Crimson managed to eliminate the initial waves of Prometheans and assist [[Poker Squad]] in fighting off more attackers. With Poker Squad safe, Crimson was sent to find [[Hawk Squad]] whose IFF tags were detected nearby. The signal eventually lead Crimson to a [[gravity lift]] the UNSC was never able to activate before leading to the roof of the main structure. On the roof, Hawk Squad's IFF tags were found, revealing that they were being used by 'Mdama's Covenant forces as [[Reclaimer]]s in an attem