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, 6 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
Military unit
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.
^ abMusser, James (7 February 2022). "Fourth Air Force (AFRC)". Air Force Historical Research Agency.
^ ab"Fourth Air Force Fact Sheet". Fourth Air Force. January 2023.
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Global Information
United States of America
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)
Air Force Reserve Command
