2557


 * The is commissioned into service.


 * July 21: Aboard the, Cortana wakes John-117 from his cryotube and warns him of Covenant forces trying to board. Once off the frigate, they realize they are on the Forerunner shield world Requiem. Having tried in vain for three years, the Covenant remnant finally gain access to the shield world; Shipmaster Jul 'Mdama orders his forces to board Forward Unto Dawn to keep the ship from landing on Requiem.


 * Summer: The Infinity picks up the distress call of the Forward Unto Dawn. Upon nearing Requiem, the ship's control systems are hacked by an unknown entity and is crash-landed on the conservation sphere's surface.