History
Little is known about Duke’s early life. Prior to the events of the canonical Duke Nukem franchise, 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.
At the start of Duke Nukem I, the evil Dr. Proton had successfully captured “Earth’s largest city,” and Duke was sent by the CIA to take it back. Duke successfully defeated Dr. Proton and his army of Techbots, thus saving all of humanity from enslavement. As a result, Duke became celebrated worldwide as the hero of Earth. It is also around this time that Duke was recruited by the secretive Earth Defense Forces and started his nationwide Duke Burger restaurant chain.
Other Media
Comic Book
IDW released Duke Nukem comics in 2011.