The 5th Air Division (5th AD) is an inactive United States Air Force unit. Its last assignment was with Strategic Air Command, based at Sidi Slimane Air Base, Morocco. It was inactivated on 15 July 1958. The unit's origins begin with its predecessor, the World War II 5th Bombardment Wing (5 BW). This unit was initially part of Twelfth Air Force before being reassigned in November 1943 to the Fifteenth Air Force. The 5th BW engaged in heavy bombardment B-17 Flying Fortress operations against Germany.