4th Combat Bombardment Wing

4th Air Division
Active	1940–41, 1942–45, 1946–49, 1951–52, 1952–88
Country	United States
Branch	United States Air Force
Role	Command of strategic strike forces
Commanders
Notable commanders	James Doolittle Frederick W. Castle
Insignia
4th Air Division emblem (approved 25 June 1974)

The 4th Air Division is an inactive United States Air Force unit. Its last assignment was with Fifteenth Air Force, stationed at Francis E. Warren Air Force Base, Wyoming. It was inactivated on 23 August 1988.

As the 4th Bombardment Wing, the unit was one of the primary B-17 Flying Fortress heavy strategic bombardment wings of VIII Bomber Command (later Eighth Air Force in World War II.

During the Cold War, the 4th Air Division' was an intermediate command echelon of Strategic Air Command, controlling strategic bombardment and intercontinental strategic missile wings until inactivated in 1988.

The 4th Bombardment Wing moved to England in June 1943 and as a part of Eighth Air Force began bombing operations against German occupied Europe. Targets included shipyards, synthetic rubber plants, chemical plants, marshalling yards, and oil facilities. In July the wing grew to seven combat groups, which resulted in a reorganization of its groups on 13 September 1943 into the 3d Bombardment Division as a new higher echelon over the 4th and two wings which had groups assigned for the first time: the 13th and 45th Combat Bomb Wings. The 4th CBW administratively controlled only two groups until December 1943, when the newly arrived 447th BG was assigned to it.

In 1944, some subordinate units attacked coastline defenses and marshalling yards in preparation for the Allied invasion of France. Some units supported ground troops during the Battle of the Bulge (December 1944 – January 1945) and the assault across the Rhine (March 1945 – April 1945).

In the postwar years, the command was part of Air Defense Command assigned as a reserve wing assigned to First Air Force from 1946 to 1949.

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