Duke Nukem is an American hero and worldwide cultural icon who has repeatedly saved Earth from armies of hostile robots, alien invaders, and mutant pig cops. Before he started kicking alien ass, Duke served in the US Army under General Graves and was stationed in Beirut, where he became friends with Dylan. Sometime later, Duke left the Army to work for the CIA. After some events we don't have time to discuss, Duke returned to Earth, when aliens started kidnapping women. He killed them all.