 As a colonel, Duke commands the Alpha Squadron of the Confederate Security Forces, and he is the face of the Confederacy for the player in the early parts of "StarCraft".Duke initially leads the defense of Confederate colonies Chau Sara and Mar Sara from the Zerg and the Protoss fleet commanded by Tassadar, for which he is promoted to general.Duke is later charged with quelling rebellion on the Confederate world of Antiga Prime, but is defeated by Mengsk's forces.