Fourth Air Force

Fourth Air Force
Shield of the Fourth Air Force
Active	1 December 1985 - present (as Fourth Air Force) 24 September 1976 - 1 December 1985 (as Fourth Air Force (Reserve)) 20 January 1966 - 30 September 1969 18 September 1942 - 1 September 1960 (as Fourth Air Force) 26 March 1941 - 18 September 1942 (as 4 Air Force) 19 October 1940 - 26 March 1941 (as Southwest Air District) (83 years, 8 months)[1]
Country	United States of America
Branch	United States Air Force (18 September 1947 – present) United States Army ( Army Air Forces, 20 June 1941 – 18 September 1947; Army Air Corps 19 October 1940 – 20 June 1941)
Type	Numbered Air Force
Role	Provide combat-ready reserve air mobility and support forces[2]
Part of	Air Force Reserve Command
Headquarters	March Air Reserve Base, California, U.S.
Engagements	World War II – American Theater[1]
Decorations	Air Force Outstanding Unit Award
Website	www.4af.afrc.af.mil
Commanders
Commander	Maj Gen Derin S. Durham
Vice Commander	Col Daniel J. Ebrecht
Command Chief	CCM Travon W. Dennis
Notable commanders	Carroll W. McColpin Benjamin H. King

The Fourth Air Force (4 AF) is a numbered air force of the Air Force Reserve Command (AFRC). It is headquartered at March Air Reserve Base, California.

4 AF directs the activities and supervises the training of more than 30,000 Air Force Reservists. If called to active duty, 4 AF's ready reserve units would be assigned to Air Mobility Command, Air Education and Training Command, and Pacific Air Forces.^[2] Several airfields are associated with the Fourth Air Force.

One of the four original pre–World War II numbered air forces, 4 AF was activated on 18 December 1940, at March Field, California with a mission of air defense of the Southwestern United States and Lower Midwest regions. During the war, its primary mission became the organization and training of combat units prior to their deployment to the overseas combat air forces.

4 AF is commanded by Major General Derin S. Durham.