The 389th Strategic Missile Wing is an inactive unit of the United States Air Force. Its last assignment was with the 13th Strategic Missile Division, being stationed at Francis E. Warren Air Force Base, Wyoming. It was inactivated on 25 March 1965. During World War II, its predecessor unit, the 389th Bombardment Group was a VIII Bomber Command B-24 Liberator unit in England. Assigned to RAF Hethel in early 1943, the group was one of three Eighth Air Force B-24 groups that took part in Operation Tidal Wave, the Ploesti Mission of 1 August 1943 (AAFRH-3).