2559

January
January 17
 * By this date, the survivors of Henry Lamb Research Facility are reduced to eight.

March
March 4 March 28 March 29 March 30
 * Orda Val 'Saham records his thoughts on the Cartographer and its link to the Covenant faith.
 * After 28 years of drifting in space the finds its way to the orbit of the Forerunner Installation 00, known as the Ark. Awakened from cryo-sleep, the crew eventually travels down to the Ark to find out how to establish contact with the galaxy. However on the surface of the Ark they encounter a hostile, violent mercenary faction known as The Banished, led by the cunning Jiralhanae warlord Atriox.
 * Ellen Anders learns more about the Forerunners thanks to Isabel, and wonders about the Librarian's plan for humanity, but she focused her attention into helping the crew against the Banished.
 * Two Unggoy attempt to desert the Banished, but they are executed by Balkarus.
 * Decimus is killed by UNSC forces. Inmediately after his death, the Spirit of Fire is attacked by the Enduring Conviction.

April
April 1 April 2
 * The Enduring Conviction is destroyed by Jerome-092 and Isabel when they forced the Ark's Aggressor Sentinels into attacking the ship. A Halo ring is discovered on the Ark's Foundry.
 * Ellen Anders and Installation 04C leave Installation 00 in hopes of getting to the Soell system, but are intercepted by a Guardian before they arrive.

May
May 1
 * Squad Sunray 1-1 manage to halt the Banished's plan of using a Forerunner to destroy the Spirit of Fire.

Unknown

 * A Sangheili shipmaster returns to the glassed human colony of Kholo. The species wide war between the Sangheili and the Jiralhanae is still ongoing.
 * Operation: SPEARBREAKER and Operation: STONEBREAKER initiated.