Marine Corps Air Station Yuma

Marine Corps Air Station Yuma or MCAS Yuma (IATA: YUM, ICAO: KNYL, FAA LID: NYL) is a United States Marine Corps air station in Arizona. It is the home of multiple squadrons of F-35B Lightning IIs of the 3rd Marine Aircraft Wing, Marine Aviation Weapons and Tactics Squadron 1 (MAWTS-1), Marine Operational Test and Evaluation Squadron 1 (VMX-1) and Marine Fighter Training Squadron 401 (VMFT-401), an air combat adversary squadron of the 4th Marine Aircraft Wing of the Marine Corps Reserve. It is a designated Superfund site due to a number of soil and groundwater contaminants, including asbestos.

The station is 2 miles (1.7 nmi; 3.2 km) from the city of Yuma, Arizona. A joint use civilian-military airport, MCAS Yuma shares airfield facilities with Yuma International Airport and occupies approximately 3,000 acres (1,200 ha), most of which is flat desert. MCAS Yuma also operates an auxiliary airfield on the Barry M. Goldwater Range.

In 1928, the federal government purchased 640 acres (260 ha) near Yuma at the recommendation of Colonel Benjamin F. Fly. Temporary dirt runways were installed for usage by military and civilian planes. It was called Fly Field.

The outbreak of World War II transformed the civilian airport into the Yuma Army Airfield. Construction of facilities began on 1 June 1942 and was activated on 15 December

Yuma AAF was a single-engine flight training school, operated by the Army Air Forces Flying Training Command, West Coast Training Center, later Western Flying Training Command. Flying training began in January 1943. Its training unit was the 307th Single Engine Flying Training Group which operated AT-6 Texans, reporting to the 37th Flying Training Wing. The base operating unit was the 403d Army Air Force Base Unit. In 1944, the unit was upgraded to multi-engine flight training, operating B-26 Marauders. In addition to the flying training, a Flexible Gunnery School was established at the airfield in November 1943. Flight training was discontinued on 23 April 1945 and gunnery training on 31 May 1945.

The base was closed on 1 November 1945. After the war, the airfield was turned over to the Department of the Interior as a headquarters for the Bureau of Land Reclamation.

On 1 January 1954, Yuma County Airport was reactivated by the United States Air Force (USAF) Air Defense Command (ADC) as a training facility. In the mid-1950s, ADC was equipped almost solely with rocket-firing F-86D Sabre and F-89C Scorpion interceptors, and Headquarters USAF decided they should have their own training base.

Yuma Airport became the home of the 4750th Training Wing (Air Defense). The 4750th had two major components, the 4750th Training Group (Air Defense) and the 4750th Training Squadron. The group had two flying squadrons assigned – the 4750th TS equipped with six F-86D Sabres and six F-94C Scorpions: and the 4750th Tow Target Squadron equipped with twelve T-33As and eight B-45As used to tow targets for the live fire portion of the course.