From Halopedia, the Halo wiki
- The first Rebel insurrection in the Eridanus System begins.
- January: The patrolling UNSC Callisto performs a routine inspection of a colonial vessel. It goes tragically awry, shots are fired, and colonists are killed.
- March 2: Three UNSC Destroyers confront the insurgent-controlled UNSC Callisto in the 26 Draconis System at the culmination of the Callisto Incident. It is effectively the beginning of the Insurrection.