Due to the large expansion of the United States Air Force as a result of the Cold War, a new lease was obtained for military use of the airport and Gulfport Air Force Base was opened as a joint-use civil–military facility. Gulfport AFB was closed as an active Air Force installation and its military facilities were transferred to the Mississippi Air National Guard, with the airport remaining a joint-use airport and Air National Guard base. Although no military aircraft are permanently assigned, the base serves as the home of the Gulfport Combat Readiness Training Center.