2513

2513 was a year in the 2510s in the 26th century.

January
January
 * Under the leadership of Robert Watts, the United Rebel Front retakes Eridanus II.

May
May 21
 * As part of the first part of Operation: TREBUCHET, United Nations Space Command forces arrive at Eridanus II to crush the United Rebel Fronts rebellion, though Robert Watts and a significant number of the group manage to evacuate.

June
June 19
 * Dr. Catherine Halsey decides upon the final name of the SPARTAN-II program, up until then tentatively referred to as "ORION Project Generation Two".

November
November 19
 * Ram Chalva is born on Komoya.

Unknown

 * Brain mutations are specifically outlawed by the UNSC MED CORPS.
 * Colonel Ponder leads a force into Elysium City to retrieve Robert Watts second in command. A confrontation develops and due to an overeager sniper, a grenade is detonated causing Ponder to lose his arm and be demoted.
 * A research team from Algolis who was working on Project: HRUNTING evaluated Mark III the Mark III exoskeleton eventually leading to the HRUNTING Mark III (B) Cyclops.
 * Alexander becomes the sixth captain of the.