2503

2503 was a year in the 2500s in the 26th century.

June
June 13
 * Admiral Harold Stanforth sends UNSC Transmission 08871D-00 to Captain Preston Cole, informing him that his second wife, Lyrenne Castilla, is a high ranking Insurrectionist leader. Cole is given three hours to bring her in, but finds that she has already fled.

July
July 6
 * Preston Cole writes to his brother Michael Cole, talking about how it was all true about Lyrenne Castilla being a high ranking Insurrectionist leader, and how she left a note that proved she was the captain of the Bellicose.

August
August 13
 * Ellen Anders is born on Arcadia.

Unknown

 * Jake Courage is born.