 A former lieutenant in Alpha Squadron, Duran formed a small commando unit after the fall of the Confederacy to fight Mengsk's Dominion.Duran quickly allied with the United Earth Directorate's expeditionary force, and used UED resources to mount an assassination attempt on Mengsk and provided vital intelligence and strategic advice on the Dominion to DuGalle.Duran convinced DuGalle to destroy the psi disruptor, to Stukov's chagrin, and as the UED closed in on Mengsk and his allies, Duran sabotaged a key operation, allowing the emperor to escape.