In the year 2525, the expansion of the Earth colonies throughout known space meets with a dangerous threat. The Covenant, a deadly alien alliance which is bent on conquering and killing anything not of them. In response, the United Nations Space Command takes steps to form a deadly new breed of soldier, the Spartan. The most famous of those Spartans is John-117 aka Master Chief. Halo: Collateral Damage #1 from Dark Horse Comics, is one of his stories.