Fairfax Field was the Kansas City airport used by 1935 USMC and 1937 Army flight training centers and for a government-leased WWII airfield in Kansas of the United States Army Air Forces. The airfield was adjacent to federal land used for WWII facilities that included a North American plant for building B-25 Mitchell bombers, a B-25 modification center, and a Military Air Transport air terminal. Post-war the Army Air Base structures were used for airliner servicing by TWA and jet & auto production by General Motors, which built a 1985 automotive factory on the airfield when the "Fairfax Municipal Airport" closed.