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*[[Rion Forge]] and her crew aboard the ''[[Ace of Spades]]'' discover the wreckage of the {{UNSCShip|Roman Blue}} on [[Eiro]].<ref name="F289">'''[[Halo: Fractures]]''', ''[[Into the Fire]]'', ''page 289''</ref>
*[[Rion Forge]] and her crew aboard the ''[[Ace of Spades]]'' discover the wreckage of the {{UNSCShip|Roman Blue}} on [[Eiro]].<ref name="F289">'''[[Halo: Fractures]]''', ''[[Into the Fire]]'', ''page 289''</ref>
*The ''Ace of Spades'' and her crew investigate the wreckage of the ''[[Radiant Perception]]'' and rescue [[Ram Chalva]] from [[Gek 'Lhar]] on [[Laconia]].<ref name="SAS">''[[Halo: Smoke and Shadow]]''</ref>
*The ''Ace of Spades'' and her crew investigate the wreckage of the ''[[Radiant Perception]]'' and rescue [[Ram Chalva]] from [[Gek 'Lhar]] on [[Laconia]].<ref name="SAS">''[[Halo: Smoke and Shadow]]''</ref>
*Rion's crew faces off with Gek 'Lhar and his [[Sangheili]] in the debris field of the [[Etran Harborage]]. [[Cade]] is killed and [[Little Bit|what remains]] of the [[shield world]]'s [[ancilla]] is recovered by the ''Ace of Spades'' crew.<ref name="SAS"/>
*Rion's crew faces off with Gek 'Lhar and his [[Sangheili]] in the debris field of the [[Etran Harborage]]. [[Cade]] is killed and [[Little Bit|what remains]] of the [[shield world]]'s [[ancilla]] is recovered by the ''Ace of Spades'' crew.{{Ref/Reuse|SAS}}


===February===
===February===
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*'''March 3''': An accident involving experimental weaponry aboard ''[[Argent Moon]]'' causes a gaseous toxic substance to spread throughout the ship via its air systems, killing nearly all aboard. Those closer to the accident are killed instantly and, depending on distance from the accident, the rest of the vessel's personnel begin suffering symptoms from the chemical minutes or hours later.<ref name="blue team intel">'''Halo 5: Guardians''', campaign level, ''[[Blue Team (level)|Blue Team]]'' - [[Mission Intel]]</ref>  
*'''March 3''': An accident involving experimental weaponry aboard ''[[Argent Moon]]'' causes a gaseous toxic substance to spread throughout the ship via its air systems, killing nearly all aboard. Those closer to the accident are killed instantly and, depending on distance from the accident, the rest of the vessel's personnel begin suffering symptoms from the chemical minutes or hours later.<ref name="blue team intel">'''Halo 5: Guardians''', campaign level, ''[[Blue Team (level)|Blue Team]]'' - [[Mission Intel]]</ref>  


*'''March 17''': All ''Argent Moon'' crew is killed by the biological agent, with only the shipboard AI, [[Rooker]], still active. As a result, ONI loses contact with ''Argent Moon'' and Rooker sends a message that warns any ONI personnel who board the station of the situation, then puts the ship on a course that keeps it away from all inhabited systems and jettisons what remains he can into open space.<ref name="blue team intel"/>
*'''March 17''': All ''Argent Moon'' crew is killed by the biological agent, with only the shipboard AI, [[Rooker]], still active. As a result, ONI loses contact with ''Argent Moon'' and Rooker sends a message that warns any ONI personnel who board the station of the situation, then puts the ship on a course that keeps it away from all inhabited systems and jettisons what remains he can into open space.{{Ref/Reuse|blue team intel}}


===May–June===
===May–June===
*'''May 6 to June 1''': ''Shadow of Intent'' participates in naval exercises with the [[UNSC Navy]] in a [[Joint Occupation Zone]]. After this, the ship is tasked with the protection of [[Sanghelios]] and [[Sangheili]] colonies.<ref name="Catalog"/>
*'''May 6 to June 1''': ''Shadow of Intent'' participates in naval exercises with the [[UNSC Navy]] in a [[Joint Occupation Zone]]. After this, the ship is tasked with the protection of [[Sanghelios]] and [[Sangheili]] colonies.{{Ref/Reuse|Catalog}}


===June===
===June===
*'''June 8''': At 0221 hours, the {{UNSCShip|Taurokado}} [[Mission to the Korinth Prior system|arrives]] in the [[Korinth Prior system]] near the accretion disk created by the remains of [[Shield World 0459]].<ref name="lootcrate4">'''[[Halo Legendary Crate]]''', ''[[Halo Legendary Crate/Data Drops|Data Drop #4]]''</ref>
*'''June 8''': At 0221 hours, the {{UNSCShip|Taurokado}} [[Mission to the Korinth Prior system|arrives]] in the [[Korinth Prior system]] near the accretion disk created by the remains of [[Shield World 0459]].<ref name="lootcrate4">'''[[Halo Legendary Crate]]''', ''[[Halo Legendary Crate/Data Drops|Data Drop #4]]''</ref>


*'''June 21''': At 0550 hours, [[After Action Report Q74S295-LR]] concerning the mission to the Korinth Prior system is sent by the [[artificial intelligence]], [[Turkish]], to [[Hugo Barton]].<ref name="lootcrate4"/>
*'''June 21''': At 0550 hours, [[After Action Report Q74S295-LR]] concerning the mission to the Korinth Prior system is sent by the [[artificial intelligence]], [[Turkish]], to [[Hugo Barton]].{{Ref/Reuse|lootcrate4}}


===July===
===July===
*'''July 2''': {{UNSCShip|Rubicon}}, an ONI vessel sent to reconnoiter [[Installation 00]] in late [[2553]], is officially declared lost.<ref name="Catalog"/>
*'''July 2''': {{UNSCShip|Rubicon}}, an ONI vessel sent to reconnoiter [[Installation 00]] in late [[2553]], is officially declared lost.{{Ref/Reuse|Catalog}}


*'''July 21'''
*'''July 21'''
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*'''July 22-July 23'''
*'''July 22-July 23'''
**Del Rio orders the Chief to join [[Gypsy Company]] and destroy Requiem's [[Gravity well|gravity well generator]] so that the ''Infinity'' can depart.<ref name="reclaimer">'''Halo 4''', campaign level ''[[Reclaimer (level)|Reclaimer]]''</ref>
**Del Rio orders the Chief to join [[Gypsy Company]] and destroy Requiem's [[Gravity well|gravity well generator]] so that the ''Infinity'' can depart.<ref name="reclaimer">'''Halo 4''', campaign level ''[[Reclaimer (level)|Reclaimer]]''</ref>
**During the mission, John-117 encounters a vision of the [[Librarian]], who warns him of the Didact's true plan: to use a machine known as the [[Composer]] to neutralize humanity once and for all. To fight the Didact, the Librarian provides the Spartan with additional genetic enhancements, including an immunity to the Composer. Once the gravity well is destroyed, Captain Del Rio orders the ''Infinity'' to leave Requiem immediately. Disobeying orders, the Master Chief stays behind in an effort to stop the Didact.<ref name="reclaimer"/>
**During the mission, John-117 encounters a vision of the [[Librarian]], who warns him of the Didact's true plan: to use a machine known as the [[Composer]] to neutralize humanity once and for all. To fight the Didact, the Librarian provides the Spartan with additional genetic enhancements, including an immunity to the Composer. Once the gravity well is destroyed, Captain Del Rio orders the ''Infinity'' to leave Requiem immediately. Disobeying orders, the Master Chief stays behind in an effort to stop the Didact.{{Ref/Reuse|reclaimer}}
**After the ''Infinity'' returns to [[Earth]], [[UNSC Fleet Command|FLEETCOM]] immediately relieves Captain Del Rio of his duties as captain of the ship due to his actions on Requiem; [[Thomas Lasky]] is promoted in his place.<ref name="midnight">'''Halo 4''', campaign level ''[[Midnight]]''</ref>
**After the ''Infinity'' returns to [[Earth]], [[UNSC Fleet Command|FLEETCOM]] immediately relieves Captain Del Rio of his duties as captain of the ship due to his actions on Requiem; [[Thomas Lasky]] is promoted in his place.<ref name="midnight">'''Halo 4''', campaign level ''[[Midnight]]''</ref>


*Between July 22 and July 24, the Didact repeatedly contacts [[Catalog]] and requests authorization to take control of the [[ecumene]]; Catalog rejects his requests.<ref name="Catalog"/>
*Between July 22 and July 24, the Didact repeatedly contacts [[Catalog]] and requests authorization to take control of the [[ecumene]]; Catalog rejects his requests.{{Ref/Reuse|Catalog}}


*'''July 24'''
*'''July 24'''
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*'''July 25'''
*'''July 25'''
**[[New Phoenix Incident]]: As the Didact plans to attack Earth and wipe out humanity using the Composer, John-117 follows him in close pursuit. When the Didact reaches Earth, the ''Infinity'' and the [[UNSC Home Fleet]] engage his ship immediately. Armed with a [[HAVOK tactical nuclear weapon|nuclear device]], John-117 makes his way into the ship and confronts the Didact, but not before the Forerunner uses the Composer to digitize the entire population of [[New Phoenix]], [[United Republic of North America|URNA]]. With the aid of a rampant Cortana, the Master Chief is eventually able to defeat the Didact, who falls into a slipspace rupture generated underneath the Composer. The Master Chief then destroys the ship with the nuclear device. Cortana sacrifices herself to save John-117 from the explosion and the Spartan is recovered from the debris field soon after.<ref name="midnight"/>
**[[New Phoenix Incident]]: As the Didact plans to attack Earth and wipe out humanity using the Composer, John-117 follows him in close pursuit. When the Didact reaches Earth, the ''Infinity'' and the [[UNSC Home Fleet]] engage his ship immediately. Armed with a [[HAVOK tactical nuclear weapon|nuclear device]], John-117 makes his way into the ship and confronts the Didact, but not before the Forerunner uses the Composer to digitize the entire population of [[New Phoenix]], [[United Republic of North America|URNA]]. With the aid of a rampant Cortana, the Master Chief is eventually able to defeat the Didact, who falls into a slipspace rupture generated underneath the Composer. The Master Chief then destroys the ship with the nuclear device. Cortana sacrifices herself to save John-117 from the explosion and the Spartan is recovered from the debris field soon after.{{Ref/Reuse|midnight}}
*Unknown to everyone, Cortana survives with the debris of the ''Mantle's Approach'' and is pulled through slipspace to the Forerunner installation designated [[Genesis]]. There, she gains access to the [[Domain]] which "cures" her rampancy. Cortana meets with the [[Warden Eternal]] and both begin to plan to take the Mantle of Responsibility for the AIs.<ref>'''[[Halo 5: Guardians]]''', campaign level ''[[Reunion]]''</ref>
*Unknown to everyone, Cortana survives with the debris of the ''Mantle's Approach'' and is pulled through slipspace to the Forerunner installation designated [[Genesis]]. There, she gains access to the [[Domain]] which "cures" her rampancy. Cortana meets with the [[Warden Eternal]] and both begin to plan to take the Mantle of Responsibility for the AIs.<ref>'''[[Halo 5: Guardians]]''', campaign level ''[[Reunion]]''</ref>
**After falling into the Composer's slipspace rupture, the Didact is thrown to the surface of Installation 03 along with other detritus from ''Mantle's Approach''. On Gamma Halo, the Didact awakens and brutally kills Team Black and the nearby UNSC science team.<ref name="HE9"/>
**After falling into the Composer's slipspace rupture, the Didact is thrown to the surface of Installation 03 along with other detritus from ''Mantle's Approach''. On Gamma Halo, the Didact awakens and brutally kills Team Black and the nearby UNSC science team.{{Ref/Reuse|HE9}}
**A group of [[SPARTAN-IV program|SPARTAN-IV]] recruits is deployed offworld at the time of the attack.<ref name="VIS"/>
**A group of [[SPARTAN-IV program|SPARTAN-IV]] recruits is deployed offworld at the time of the attack.{{Ref/Reuse|VIS}}
**A service [[portal]] opens between the [[Composer's Abyss]] on [[Installation 03]] and the [[Composer's Forge]]. The latter's monitor, [[859 Static Carillon]], attempts to contact the Halo's caretaker, [[049 Abject Testament]], but receives no response. Static Carillon travels through the portal to Installation 03, where he meets the Didact who asks to be taken to the Composer's Forge.<ref name="HE9"/>
**A service [[portal]] opens between the [[Composer's Abyss]] on [[Installation 03]] and the [[Composer's Forge]]. The latter's monitor, [[859 Static Carillon]], attempts to contact the Halo's caretaker, [[049 Abject Testament]], but receives no response. Static Carillon travels through the portal to Installation 03, where he meets the Didact who asks to be taken to the Composer's Forge.{{Ref/Reuse|HE9}}
**John-117 is debriefed by the [[UNSC Security Council]] about the Didact and the loss of Cortana. The Council decides to tell the public that the attack was carried out by the [[Covenant remnants]] and it was stopped by Master Chief.<ref name="escalation8"/>
**John-117 is debriefed by the [[UNSC Security Council]] about the Didact and the loss of Cortana. The Council decides to tell the public that the attack was carried out by the [[Covenant remnants]] and it was stopped by Master Chief.{{Ref/Reuse|escalation8}}
**[[Terrence Hood|Fleet Admiral Terrence Hood]] informs John-117 about the loss of contact with the Installation 03 science team an hour earlier, and that the attackers may have been Prometheans. John reunites with [[Blue Team]] — [[Frederic-104]], [[Kelly-087]] and [[Linda-058]] — and deploys immediately to Gamma Halo.<ref name="escalation8"/>
**[[Terrence Hood|Fleet Admiral Terrence Hood]] informs John-117 about the loss of contact with the Installation 03 science team an hour earlier, and that the attackers may have been Prometheans. John reunites with [[Blue Team]] — [[Frederic-104]], [[Kelly-087]] and [[Linda-058]] — and deploys immediately to Gamma Halo.{{Ref/Reuse|escalation8}}


*'''July 26'''
*'''July 26'''
**After arriving at Gamma Halo, Blue Team find the bodies of the deceased science team and Team Black. After a short firefight with [[Promethean Knight]]s, Blue Team discovers the former location of the Composer. Upon entering the structure, the Spartans discover the [[Composer's Abyss]], at the end of which they find the slipspace portal leading to the Composer's Forge.<ref name="escalation8"/>
**After arriving at Gamma Halo, Blue Team find the bodies of the deceased science team and Team Black. After a short firefight with [[Promethean Knight]]s, Blue Team discovers the former location of the Composer. Upon entering the structure, the Spartans discover the [[Composer's Abyss]], at the end of which they find the slipspace portal leading to the Composer's Forge.{{Ref/Reuse|escalation8}}
**Blue Team enter the portal to the Composer's Forge where they discover six Composers. The Didact confronts the Spartans along with a newly-created army of Promethean constructs.<ref name="HE9"/>
**Blue Team enter the portal to the Composer's Forge where they discover six Composers. The Didact confronts the Spartans along with a newly-created army of Promethean constructs.{{Ref/Reuse|HE9}}
**During the ensuing battle, Static Carillon transports Installation 03 above the Composer's Forge as part of an agreement between himself and the Didact. The Didact takes one of the Composers and departs for Gamma Halo, planning to use the ring to wipe out humanity. However, the monitor feels betrayed by the Didact bringing his "abominations" to the Composer's Forge and helps Blue Team return to the portal in pursuit of the Didact, intending to close the portal behind them.<ref name="HE9"/>
**During the ensuing battle, Static Carillon transports Installation 03 above the Composer's Forge as part of an agreement between himself and the Didact. The Didact takes one of the Composers and departs for Gamma Halo, planning to use the ring to wipe out humanity. However, the monitor feels betrayed by the Didact bringing his "abominations" to the Composer's Forge and helps Blue Team return to the portal in pursuit of the Didact, intending to close the portal behind them.{{Ref/Reuse|HE9}}
**As Blue Team returns to the surface of Gamma Halo, they are attacked and easily subdued by the Didact. Before the Forerunner can execute the Spartans, 859 Static Carillon appears, disables the Didact and teleports him into the Halo's [[Control Room (Installation 03)|control room]]. John-117 follows the Didact into the control center where he enables Static Carillon to eject the segment of the ring housing the control room. The detached section of the Halo plunges into the Composer's Forge; the Didact is consumed by the ensuing blast while the Master Chief is safely teleported aboard Blue Team's Longsword in orbit.<ref name="escalation10">'''Halo: Escalation''' - ''[[Halo: Escalation Issue 10|Issue #10]]''</ref>
**As Blue Team returns to the surface of Gamma Halo, they are attacked and easily subdued by the Didact. Before the Forerunner can execute the Spartans, 859 Static Carillon appears, disables the Didact and teleports him into the Halo's [[Control Room (Installation 03)|control room]]. John-117 follows the Didact into the control center where he enables Static Carillon to eject the segment of the ring housing the control room. The detached section of the Halo plunges into the Composer's Forge; the Didact is consumed by the ensuing blast while the Master Chief is safely teleported aboard Blue Team's Longsword in orbit.<ref name="escalation10">'''Halo: Escalation''' - ''[[Halo: Escalation Issue 10|Issue #10]]''</ref>


Line 72: Line 72:
**[[Battle of Installation 03]]: Jul 'Mdama's Covenant assault Installation 03 and take control of the site known as the [[Altar]] in order to use the [[Conduit]] to enable a massive Promethean invasion of the Halo through slipspace portals. However, a Spartan [[unidentified Headhunter|Headhunter]] assaults the Altar and obtains the Conduit.<ref>'''[[Halo: Spartan Strike]]''', ''[[Operation C: Valiant Hammer]]''</ref>
**[[Battle of Installation 03]]: Jul 'Mdama's Covenant assault Installation 03 and take control of the site known as the [[Altar]] in order to use the [[Conduit]] to enable a massive Promethean invasion of the Halo through slipspace portals. However, a Spartan [[unidentified Headhunter|Headhunter]] assaults the Altar and obtains the Conduit.<ref>'''[[Halo: Spartan Strike]]''', ''[[Operation C: Valiant Hammer]]''</ref>
**[[Battle of New Phoenix]]: Shortly after the composition of New Phoenix, 'Mdama's Covenant open portals in [[New Phoenix ONI facility|an ONI base]] in the city through a [[unidentified Forerunner machine|Forerunner artifact]] stored there with the intent of launching an all-out invasion of Earth. The UNSC is able to stop the attack using the Conduit.<ref>'''Halo: Spartan Strike''', ''[[Operation D: Adamantine Shield]]''</ref>
**[[Battle of New Phoenix]]: Shortly after the composition of New Phoenix, 'Mdama's Covenant open portals in [[New Phoenix ONI facility|an ONI base]] in the city through a [[unidentified Forerunner machine|Forerunner artifact]] stored there with the intent of launching an all-out invasion of Earth. The UNSC is able to stop the attack using the Conduit.<ref>'''Halo: Spartan Strike''', ''[[Operation D: Adamantine Shield]]''</ref>
**859 Static Carillon takes Installation 03 to an unknown location for repairs.<ref name="escalation10"/>
**859 Static Carillon takes Installation 03 to an unknown location for repairs.{{Ref/Reuse|escalation10}}


*'''July 27''': Blue Team returns to Earth; John-117 is debriefed by Admiral Hood, who congratulates him on defeating the Didact. However, the Master Chief believes the Didact is not dead, but merely "contained". While Hood suggests that he and Blue Team stand down and have some rest, the Master Chief instead leads the team on a new mission.<ref name="escalation10"/>
*'''July 27''': Blue Team returns to Earth; John-117 is debriefed by Admiral Hood, who congratulates him on defeating the Didact. However, the Master Chief believes the Didact is not dead, but merely "contained". While Hood suggests that he and Blue Team stand down and have some rest, the Master Chief instead leads the team on a new mission.{{Ref/Reuse|escalation10}}


===September===
===September===
*'''September 12''': Rooker begins to suffer from rampancy due to being six months past his "expiration date". Feeling he can no longer manage the ''Argent Moon'', he initiates his own destruction.<ref name="blue team intel"/>
*'''September 12''': Rooker begins to suffer from rampancy due to being six months past his "expiration date". Feeling he can no longer manage the ''Argent Moon'', he initiates his own destruction.{{Ref/Reuse|blue team intel}}


*'''September 26''': Two months after [[Cortana]]'s supposed death, [[Beta-5 Division]] operative [[Sapphire Three]] interviews [[John-117]] regarding his visions of and interactions with the [[AI]] in late [[2552]].<ref name="DD">'''[[Halo Legendary Crate]]''', ''[[Halo Legendary Crate/Data Drops|Data Drop #9]]''</ref>
*'''September 26''': Two months after [[Cortana]]'s supposed death, [[Beta-5 Division]] operative [[Sapphire Three]] interviews [[John-117]] regarding his visions of and interactions with the [[AI]] in late [[2552]].<ref name="DD">'''[[Halo Legendary Crate]]''', ''[[Halo Legendary Crate/Data Drops|Data Drop #9]]''</ref>

Revision as of 07:13, April 15, 2021

2557
H4-ComposerFiringOnPhoenix.jpg
The Ur-Didact fires the Composer at New Phoenix.

26th century

Previous: 25552556
Next: 25582559


For a complete list, see our timeline category.

2557 was a year in the 2550s in the 26th century.

Events

January

February

March

  • March 3: An accident involving experimental weaponry aboard Argent Moon causes a gaseous toxic substance to spread throughout the ship via its air systems, killing nearly all aboard. Those closer to the accident are killed instantly and, depending on distance from the accident, the rest of the vessel's personnel begin suffering symptoms from the chemical minutes or hours later.[6]
  • March 17: All Argent Moon crew is killed by the biological agent, with only the shipboard AI, Rooker, still active. As a result, ONI loses contact with Argent Moon and Rooker sends a message that warns any ONI personnel who board the station of the situation, then puts the ship on a course that keeps it away from all inhabited systems and jettisons what remains he can into open space.[6]

May–June

June

July

  • July 21
    • Having tried in vain for three years, Jul 'Mdama's Covenant faction finally gain access to the shield world Requiem; Shipmaster Jul 'Mdama orders his forces to board UNSC Forward Unto Dawn to keep the ship from landing on Requiem.[8] Aboard the Forward Unto Dawn, Cortana wakes John-117 from his cryotube and warns him of the intruders. Once off the frigate, they are forcibly pulled into the artificial planet.[9]
    • John-117 and Cortana engage 'Mdama's Covenant forces on Requiem while attempting to find a way back to UNSC-controlled space. Meanwhile, UNSC Infinity is approaching Requiem, oblivious of the gravity well which pulled the Dawn and many Covenant ships inside. While attempting to clear the communications interference preventing them from contacting Infinity, John-117 and Cortana are attacked by mechanical Promethean forces. Activating a supposed broadcast relay in Requiem's core, John-117 instead accidentally releases the Didact from imprisonment. Bent on preventing human ascendance, the Didact leaves immediately and joins forces with Jul 'Mdama's Covenant.[10]
    • UNSC Infinity crashes on Requiem. The Didact makes for the crash-site, followed by the Master Chief, who reunites with the UNSC for the first time in years and assists in the defense of the stranded Infinity, eventually driving back the Didact and 'Mdama's Covenant forces. Afterwards, Captain Andrew Del Rio has a difference of opinion with the Master Chief on whether or not they should leave Requiem, or stay and deal with the Didact.[11][12]
  • July 22-July 23
    • Del Rio orders the Chief to join Gypsy Company and destroy Requiem's gravity well generator so that the Infinity can depart.[13]
    • During the mission, John-117 encounters a vision of the Librarian, who warns him of the Didact's true plan: to use a machine known as the Composer to neutralize humanity once and for all. To fight the Didact, the Librarian provides the Spartan with additional genetic enhancements, including an immunity to the Composer. Once the gravity well is destroyed, Captain Del Rio orders the Infinity to leave Requiem immediately. Disobeying orders, the Master Chief stays behind in an effort to stop the Didact.[13]
    • After the Infinity returns to Earth, FLEETCOM immediately relieves Captain Del Rio of his duties as captain of the ship due to his actions on Requiem; Thomas Lasky is promoted in his place.[14]
  • Between July 22 and July 24, the Didact repeatedly contacts Catalog and requests authorization to take control of the ecumene; Catalog rejects his requests.[3]
  • July 24
    • Raid on Ivanoff Station: John-117 pursues the Didact as he travels to Ivanoff Station to acquire the Composer. The Didact is eventually successful and uses the Composer to digitize the occupants of Ivanoff, save for John-117 who is saved by the Librarian's enhancements.[15][16]
    • SPARTAN-II Black Team, assigned as security for a science camp on Installation 03, loses contact with Ivanoff Station immediately after the attack.[17]
  • July 25
    • New Phoenix Incident: As the Didact plans to attack Earth and wipe out humanity using the Composer, John-117 follows him in close pursuit. When the Didact reaches Earth, the Infinity and the UNSC Home Fleet engage his ship immediately. Armed with a nuclear device, John-117 makes his way into the ship and confronts the Didact, but not before the Forerunner uses the Composer to digitize the entire population of New Phoenix, URNA. With the aid of a rampant Cortana, the Master Chief is eventually able to defeat the Didact, who falls into a slipspace rupture generated underneath the Composer. The Master Chief then destroys the ship with the nuclear device. Cortana sacrifices herself to save John-117 from the explosion and the Spartan is recovered from the debris field soon after.[14]
  • Unknown to everyone, Cortana survives with the debris of the Mantle's Approach and is pulled through slipspace to the Forerunner installation designated Genesis. There, she gains access to the Domain which "cures" her rampancy. Cortana meets with the Warden Eternal and both begin to plan to take the Mantle of Responsibility for the AIs.[18]
    • After falling into the Composer's slipspace rupture, the Didact is thrown to the surface of Installation 03 along with other detritus from Mantle's Approach. On Gamma Halo, the Didact awakens and brutally kills Team Black and the nearby UNSC science team.[17]
    • A group of SPARTAN-IV recruits is deployed offworld at the time of the attack.[19]
    • A service portal opens between the Composer's Abyss on Installation 03 and the Composer's Forge. The latter's monitor, 859 Static Carillon, attempts to contact the Halo's caretaker, 049 Abject Testament, but receives no response. Static Carillon travels through the portal to Installation 03, where he meets the Didact who asks to be taken to the Composer's Forge.[17]
    • John-117 is debriefed by the UNSC Security Council about the Didact and the loss of Cortana. The Council decides to tell the public that the attack was carried out by the Covenant remnants and it was stopped by Master Chief.[16]
    • Fleet Admiral Terrence Hood informs John-117 about the loss of contact with the Installation 03 science team an hour earlier, and that the attackers may have been Prometheans. John reunites with Blue TeamFrederic-104, Kelly-087 and Linda-058 — and deploys immediately to Gamma Halo.[16]
  • July 26
    • After arriving at Gamma Halo, Blue Team find the bodies of the deceased science team and Team Black. After a short firefight with Promethean Knights, Blue Team discovers the former location of the Composer. Upon entering the structure, the Spartans discover the Composer's Abyss, at the end of which they find the slipspace portal leading to the Composer's Forge.[16]
    • Blue Team enter the portal to the Composer's Forge where they discover six Composers. The Didact confronts the Spartans along with a newly-created army of Promethean constructs.[17]
    • During the ensuing battle, Static Carillon transports Installation 03 above the Composer's Forge as part of an agreement between himself and the Didact. The Didact takes one of the Composers and departs for Gamma Halo, planning to use the ring to wipe out humanity. However, the monitor feels betrayed by the Didact bringing his "abominations" to the Composer's Forge and helps Blue Team return to the portal in pursuit of the Didact, intending to close the portal behind them.[17]
    • As Blue Team returns to the surface of Gamma Halo, they are attacked and easily subdued by the Didact. Before the Forerunner can execute the Spartans, 859 Static Carillon appears, disables the Didact and teleports him into the Halo's control room. John-117 follows the Didact into the control center where he enables Static Carillon to eject the segment of the ring housing the control room. The detached section of the Halo plunges into the Composer's Forge; the Didact is consumed by the ensuing blast while the Master Chief is safely teleported aboard Blue Team's Longsword in orbit.[20]
  • July 24-July 26
    • Battle of Installation 03: Jul 'Mdama's Covenant assault Installation 03 and take control of the site known as the Altar in order to use the Conduit to enable a massive Promethean invasion of the Halo through slipspace portals. However, a Spartan Headhunter assaults the Altar and obtains the Conduit.[21]
    • Battle of New Phoenix: Shortly after the composition of New Phoenix, 'Mdama's Covenant open portals in an ONI base in the city through a Forerunner artifact stored there with the intent of launching an all-out invasion of Earth. The UNSC is able to stop the attack using the Conduit.[22]
    • 859 Static Carillon takes Installation 03 to an unknown location for repairs.[20]
  • July 27: Blue Team returns to Earth; John-117 is debriefed by Admiral Hood, who congratulates him on defeating the Didact. However, the Master Chief believes the Didact is not dead, but merely "contained". While Hood suggests that he and Blue Team stand down and have some rest, the Master Chief instead leads the team on a new mission.[20]

September

  • September 12: Rooker begins to suffer from rampancy due to being six months past his "expiration date". Feeling he can no longer manage the Argent Moon, he initiates his own destruction.[6]

November

  • November 15: The holiday known as "Yanumas" is celebrated for the first time.[24]

December

  • December 5: Roland becomes Infinity's primary shipboard AI.[19]
  • An ONI analyst sends a warning memorandum to UNSC High Command regarding growing threats of Kig-Yar pirates near key trade routes. The UNSC disregards ONI's repeated requests for official action against the Kig-Yar.[26]

Unknown date

Sources