United States
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| United States Air Force
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| Air Force Reserve Command
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| Robins Air Force Base
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|}Fourth Air Force is a Numbered Air Force in Air Force Reserve Command (AFRC). It is an intermediate echelon responsible primarily for all Air Mobility Command (AMC) gained AFRC air refueling units in the United States and AMC gained AFRC strategic airlift units in the western United States.
Formed in the United States during World War II to provide air defense and combat training for the personnel of newly formed units. After World War II, Fourth Air Force was assigned to the reestablished Air Defense Command, later to Continental Air Command, and back to Air Defense Command. From September 1960 to January 1966 the organization was inactive. It was deactivated again in September 1969. In October 1976 Fourth Air Force reactivated as a part of the Air Force Reserves (AFRES).
