Editing 97,445 BCE

{{Era|Forerunner}}
{{Timeline}}
{{References}}
In approximately '''100,000 BCE''', the [[Forerunner-Flood war]] came to a close with the activation of the [[Halo Array]]. It should be noted that all of the events listed here are approximate at best, occurring over the course of several years during the last decade<ref name="caveat">'''Halo: Silentium''', ''page 11-12''</ref> before the firing of the Halo rings around the year 100,000 BCE.<ref group="note">[[343 Guilty Spark]] put the date of the firing of the Array as the year 97,448 BCE, though it should be noted that he measured it on Installation 04's year, not the 365.25 day Earth calendar.</ref> As no definite chronology has been established for that timeframe, the events therein are recorded on this page for the sake of convenience.

*Roughly '''ten years''' before the Flood conflict's conclusion, the father of [[Maker-of-Moons]], a high-ranked [[Builder]], is assassinated by [[Master Builder]] [[Faber]]'s [[Builder Security]] minions.<ref>'''Halo: Silentium''', ''page 90''</ref>

*The [[Librarian]] visits the primary [[San 'Shyuum]] quarantine world [[Janjur Qom]] to collect specimens of the San 'Shyuum as part of the [[Conservation Measure]], sparking unrest among the San 'Shyuum population. After [[Master Builder]] [[Faber]] arrives some time afterward to question the San 'Shyuum elders about the [[Flood]], the San' Shyuum [[Battle of Janjur Qom|rebel]] against his forces.<ref>'''Halo: Cryptum''', ''page 212''</ref>

*The [[Ur-Didact|Didact]] is resuscitated from his exile in a [[Cryptum]] by [[IsoDidact|Bornstellar Makes Eternal Lasting]], [[Chakas]] and [[Riser]]. They later make their way to Janjur Qom, where they are captured by Master Builder Faber. The Didact is interrogated and left to die in a Flood-infested system, while an offshoot of his consciousness lives on in Bornstellar's body through an imprint acquired in his [[Forerunner mutation|mutation]].<ref>'''Halo: Primordium''', ''page 336-339''</ref>

*Shortly afterward, the Master Builder orders the [[Contender-class artificial intelligence|Contender-class]] [[ancilla]] [[05-032 Mendicant Bias]] to use [[Installation 07]] to put down the San 'Shyuum rebellion by sterilizing the entire system.<ref name="p191">'''Halo: Primordium''', ''page 191-192''</ref>

*As a result of the Master Builder's activation of the Halo ring, many [[Lifeworker]]s and [[Warrior-Servant]]s on Installation 07 rebel against his forces, but are mostly defeated.<ref name="p191"/>

*A crisis occurs in the [[Ecumene Council]] due to the Master Builder's unauthorized activation of Installation 07; many councilors resign in protest while younger ones take their place. Faber is arrested and placed on trial in the Forerunner [[Capital]]. Eleven of the Halos are brought to the Capital, awaiting a decision to have them decommissioned. Installation 07 and Mendicant Bias remain missing.<ref>'''Halo: Cryptum''', ''page 245''</ref>

*During Faber's tribunal, Mendicant Bias, convinced to turn against its masters by the [[Primordial]], brings Installation 07 to the Capital system and [[Battle of the Capital|launches an assault]] on the Forerunner government.<ref name="p191"/> While the Council's fleets respond to the attack and several of the Halos are destroyed, Mendicant successfully fires Installation 07 before the Halo is forced to retreat into a system near the galaxy's edges.<ref>'''Halo: Primordium''', ''page 272''</ref>

*Having survived Mendicant Bias' attack on the capital, Bornstellar, [[Glory of a Far Dawn]] and [[Splendid Dust of Ancient Suns]] arrive at the [[greater Ark]], where they are healed by the Lifeworkers. As most Forerunners believe the original Didact to be dead, the Didact's consciousness takes control of Bornstellar in order to assume command of Forerunner military forces after a thousand years of exile and continue his mission against the Flood;<ref>'''Halo: Cryptum''', ''page 341''</ref> subsequently, Bornstellar adopts the title [[IsoDidact]].<ref>'''Halo: Silentium''', ''page 20''</ref>

*Shortly afterward, the IsoDidact and his fleet track down Installation 07. Although the Halo takes heavy damage, it survives and is transported to the greater Ark. Afterwards, the installation is sent to its final location, to be later joined by the six rings of the newer Halo Array.
**The Primordial is imprisoned once again, and is interrogated - and eventually executed - by the IsoDidact.<ref>'''Halo: Primordium''', ''page 359-367''</ref>
**Mendicant Bias is captured, deactivated and disassembled to its disparate components which are then distributed across the ecumene.<ref name="mb">'''Halo: Silentium''', ''page 267-268''</ref>
**The mind of a mortally wounded [[Chakas]] is used as the template for the [[monitor]] later to be known as [[343 Guilty Spark]].<ref>'''Halo: Primordium''', ''page 372''</ref>

*The Ecumene Council is reconstituted as the "New Council" and the Didact's plans of a strategy to use [[shield world]]s to combat the Flood are taken into serious consideration again. The use of the Halos is delayed.<ref>'''Halo: Primordium''', ''page 373-374''</ref>

*For a period of '''three years''' following the crisis at the Capital, Master Builder Faber, thought dead by the ecumene at large, carries out his own small-scale campaign to combat the Flood with a crew of Builder Security and disgraced Warrior-Servants in a secluded region of the ecumene. He captures and haphazardly decontaminates small Flood-infested ships and then hands them over to Warrior-Servant crews. Due to inadequate decontamination, many of the ships are overrun by Flood still on board.<ref>'''Halo: Silentium''', ''page 193-195''</ref>

*The [[Juridical]] rate is given unrestricted access to all citizens of the ecumene by the Council, with the mandate to investigate matters surrounding the attack on the Capital, Forerunner and human origins, as well as the fate of the Precursors. To this end, the Juridicals dispatch [[Catalog]] to collect testimony from key Forerunner figures, including the Librarian, Ur-Didact, IsoDidact and Faber.<ref name="caveat"/>

*The [[Ur-Didact]], having been left to die in a Flood-infested system by the Master Builder, encounters active Precursor [[star road]]s near [[Uthera Midgeerrd]]. The Didact is subsequently captured and corrupted by the Gravemind. Afterwards, the Gravemind releases the Didact, who is rescued and taken to the Capital system by the Master Builder.<ref name="silentium"/>

*The Librarian and the IsoDidact arrive at Earth to oversee its evacuation operation and to give their testimonies to Catalog. However, the Flood's arrival in the sector prompts the IsoDidact to leave to defend the core of the ecumene while the Librarian continues her mission; the two will not reunite until four years later.<ref>'''Halo: Silentium''', ''String 2''</ref>

*[[05-032 Mendicant Bias]] is reassembled and reactivated by a Gravemind after the Flood overruns the facilities in which the components of the AI were held.<ref name="mb"/>

*[[Catalog]] is captured by the Flood and corrupted with the [[logic plague]],<ref>'''Halo: Silentium''', ''page 210''</ref> subsequently spreading the infection across the [[Juridical|Juridical network]].<ref>'''Halo: Silentium''', ''page 215''</ref> With the network suspended, Juridicals are eventually forced to cease all Forerunner legal proceedings indefinitely.<ref>'''Halo: Silentium''', ''page 190''</ref>

*The Flood begins to reactivate and appropriate formerly dormant Precursor artifacts, allowing them to easily overpower Forerunners in combat. Already weakened and exhausted Forerunner defenses continue to fail at an increasing rate.<ref>'''Halo: Silentium''', ''String 25''</ref>

*'''Over a year''' before the end of the war, following irregular outages for several years, the [[Domain]] goes permanently inaccessible to all Forerunners and ancillas due to the Flood's widespread tapping into its underlying [[neural physics]] architecture.<ref>'''Halo: Silentium''', ''page 241''</ref>

*'''Four years''' after the evacuation of Erde-Tyrene,<ref>'''Halo: Silentium''', ''page 197''</ref> the Librarian, the IsoDidact and the Ur-Didact reunite in their family estate on [[Nomdagro]]. The planet is subsequently overrun by the Flood.<ref>'''Halo: Silentium''', ''page 232''</ref>

*After the Capital system is lost to the Flood, command of the ecumene and the bulk of its remaining population is placed at the [[greater Ark]]. In the face of imminent defeat, the Master Builder is restored to command and a decision is made to use the Halo Array to purge the galaxy of life and thus starve the Flood. The IsoDidact is tasked with carrying out this plan.<ref name="silentium"/>

*Mendicant Bias and its fleet of Flood-controlled ships and Precursor constructs [[Battle of the greater Ark|assault the greater Ark]].<ref name="silentium"/>

*While the Forerunners attempt to evacuate the greater Ark, the Ur-Didact uses the [[Composer]] to harvest the preserved human specimens on the nearby [[Omega Halo]] in order to use their patterns to create AIs for his army of [[Promethean Knight]]s, a desperate and futile effort to combat the Flood via conventional means.<ref name="silentium">'''Halo: Silentium'''</ref>

*Master Builder Faber fires Omega Halo, sterilizing the local galaxy of [[Path Kethona]] of sentient life and clearing a temporary path past the star roads laying siege on the greater Ark.<ref name="silentium"/>

*The greater Ark and Omega Halo are destroyed by star roads; Faber and most high-ranking Forerunner commanders are killed on Omega Halo, while the IsoDidact is saved by Monitor Chakas. Only a fraction of the Lifeworkers' biological specimens survive and are transported to the secret [[Installation 00]] by the few surviving Forerunners.<ref name="silentium"/>

*The Librarian, horrified by the Ur-Didact's genocide of the human population of Omega Halo, sends [[Chant-to-Green]] to collect more humans from Earth to ensure their numbers will be sufficient to repopulate the species.<ref name="silentium"/> The Librarian herself infiltrates [[Requiem]] and imprisons the Didact in a [[Cryptum]].<ref>'''[[Halo 4]]''', ''[[Terminal/Halo 4|Terminal 7]]''</ref>

*The Librarian journeys to Earth, planning to draw the Flood there in order to give the IsoDidact time to fire the Halo rings. She sends Chant-to-Green to the lesser Ark, along with the remaining humans gathered from the planet, and passes her title of [[Lifeshaper]] on to Chant.<ref name="silentium"/>

*At Installation 00, the IsoDidact assigns the [[monitor]]s for each Halo installation and has the rings distributed across the galaxy.<ref name="silentium"/>
**Monitor Chakas is renamed [[343 Guilty Spark]] and assigned as the caretaker of [[Installation 04]].<ref name="silentium"/>

*The Librarian, stranded on Earth, initiates the burial process of the [[Portal at Voi]]. As she spends her last hours in the savanna, the Gravemind sends down imprinted ancient human essences to reveal the [[Domain]]'s true nature as a Precursor creation; as a result, the Domain will be destroyed when the Halos fire, leading to the loss of not only all Forerunner history but also the knowledge the Precursors had collected over the course of billions of years.<ref>'''Halo: Silentium''', ''String 37''</ref>

*As the IsoDidact prepares to activate the rings, Mendicant Bias assembles all Flood-controlled vessels into a fleet of 4.8 million ships, and breaches the [[Maginot Sphere]]. On the other side awaits [[Offensive Bias]] with the remains of the Forerunner fleet. As the two fleets engage each other in an [[Battle of the Maginot Sphere|enormous naval battle]], the Halo Array is fired. The Halo pulse kills all sentient life within three radii of the galactic center, including any Forerunners not located on [[Installation 00|the Ark]] or within [[Shield World]]s. Minutes after the firing of the Array, Mendicant Bias's fleet is decimated by Offensive Bias.<ref>'''[[Halo 3]]''', ''[[Terminal]]s''</ref>

*The remains of Mendicant Bias are brought to Installation 00. The surviving Forerunners hold a trial to the AI for its betrayal; Mendicant Bias is entombed in the installation afterward.<ref name="rebirth">'''[[Halo: Rebirth]]'''</ref>

*Every sentient species indexed in [[Installation 00|the Ark]] is [[reintroduction|returned]] to their homeworlds as a part of the [[Conservation Measure]], the [[Human|''Homo sapiens'']] species begins migrating out of [[Africa]].

*The few surviving Forerunners go into self-imposed exile.<ref name="rebirth"/>

==Note==
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== Sources ==
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