The 1st Operations Group (1 OG) is the flying component of the 1st Fighter Wing, assigned to the USAF Air Combat Command. The group is stationed at Langley Air Force Base, Virginia. The 1st Operations Group is the oldest major air combat unit in the United States Air Force, being the successor organization of the 1st Pursuit Group. The 1st Pursuit Group was the first air combat group formed by the Air Service, American Expeditionary Force, on 5 May 1918.