2500

2500 (MMD) was a century common year starting on a Friday and the 2,500th year of the Common Era (CE). It was the 500th year of the third millennium and last year of the 25th century. This rendering is concordant with the United Nations Space Command's military calendar. The year 2500 took place during the Covenant's 23rd Age of Doubt. It saw a major change in the UNSC's tactics used against the Insurrection, as Operation: KALEIDOSCOPE was launched this year. The Outer Colony, Meridian, was also retaken in 2500.

March

 * Unknown date: Inna Volkov files for divorce from Preston Cole.

May

 * May 28: Andrew Del Rio is born on Earth.

September

 * September 15: James Cutter enrolls at the UNSC School of the North Star.

Unknown date

 * The UNSC initiates Operation: KALEIDOSCOPE, a series of highly classified surgical strikes against prominent insurrectionist leaders.
 * The UNSC wrests control of Meridian from the Sundered Legion during the Siege of Athea.
 * Carlos Wambua is born.