The 4th Airlift Squadron is a unit within the United States Air Force, specifically operating under the Air Mobility Command. Established in 1956, its primary role involves strategic and tactical airlift missions, as well as air-to-air refueling operations to support various military branches worldwide. The squadron is stationed at Travis Air Force Base, California, and operates the C-17 Globemaster III aircraft fleet. Its mission is essential for the rapid global mobility of troops, equipment, and supplies during peacetime and conflict situations.