2537


 * An insurrection takes place on Mamore in either 2536 or 2537, resulting in the insurrectionist forces being put down by the Spartan-IIIs of Alpha Company.
 * Conflicts in the Bonanza asteroid belt and the Far-gone colony platforms are fought in either 2536 or 2537.
 * The Battle of New Constantinople is fought in 2537.
 * The Battle of Leonis Minoris ends in a pyrrhic UNSC victory as two of the Leonis Minoris colonies are glassed and a third saved.
 * The Battle of New Harmony takes place, resulting in a rare UNSC Navy victory and the discovery of Covenant shipyard K7-49.

January

 * January 1: Serina awakens engineering specialist Violeta Maldini in order to perform operations and maintenance on the . Specialist Maldini is attacked by a Flood infection form and is overtaken by the parasite. Serina locks the resultant combat form in Cryo-bay Foxtrot 7.
 * January 2: Serina notes that while the Flood form does not appear to be experiencing suffering, it does seem like it is hungry.
 * January 3: The combat form begins to morph to become more like a carrier form.
 * January 4: The Flood disperse new infection forms and overtake more crew members in an attempt to break quarantine. Spartan SCPO Jerome-092 is awoken and exterminates all infected personnel, eliminating the Flood presence on the Spirit of Fire. After the event, Serina starts her final dispensation, killing herself.

July

 * July 27th: Operation: PROMETHEUS. Most of Spartan-III Alpha Company destroys a Covenant shipyard on asteroid K7-49, but all 300 of the participating Spartans are killed in the process.
 * July 30th: Kurt discovers the fate of Alpha Company and acquires the candidates for Beta Company.
 * The 2nd class of Spartan-IIs are conscripted. Of which are Yasmine Zaman and Nicole-458.