The Lockheed C-5 Galaxy is a large military transport aircraft built by Lockheed. It was designed to provide strategic heavy airlift over intercontinental distances and to carry outsize and oversize cargo. The C-5 Galaxy has been operated by the United States Air Force (USAF) since 1969 and is one of the largest military aircraft in the world.
The first C-5A was delivered to the USAF on 17 December 1969. Wings were built up in the early 1970s at Altus AFB, Oklahoma, Charleston AFB, Dover AFB, Delaware, and Travis AFB, California. 9 July 1970 marked the C-5's first mission in Southeast Asia during the Vietnam War. Through the rest of the war, C-5s were used to transport equipment and troops, including Army tanks and various smaller aircraft. C-5s have also been used to deliver support and reinforce various U.S. allies over the years, critically delivered weapons and supplies to Israel as part of Operation Nickel Grass in 1973, in which the aircraft performed to such a high degree that the Pentagon considered further purchases. The C-5 was also made available to support British-led peacekeeping efforts in Zimbabwe in 1979.