SPARTAN-003, or Mike, was a SPARTAN supersoldier, of the SPARTAN-II Program's 1st Generation, and a part of the NavSpecWar group in the UNSCDF, and at times, an ONI operative, under the designation TRIAD. Mike was a veteran of over 100 battles, with a multitude of others classified and unaccounted for, and was also one of the survivors of the Human-Covenant War. He also took part in various conflicts throughout the Post War Era, leading up to his death in 2589.