The 125th Fighter Squadron (125 FS) is a unit of the Oklahoma Air National Guard 138th Fighter Wing located at Tulsa Air National Guard Base, Oklahoma. The 125th is equipped with the Block 42 F-16C Fighting Falcon. The squadron is a descendant organization of the 125th Aero Squadron, established on 30 July 1940. It was one of the 29 original National Guard Observation Squadrons of the United States Army National Guard formed before World War II.