10 May 1971: TOS USAF and assigned to the 172nd Tactical Air Support Squadron/110th Tactical Air Support Group (ANG), Battle Creek, MI. 1980: Redesignated OA-37B. 3/91: Withdrawn from use and put on display at the Battle Creek ANG Base. 1996: Air Commando park at Hurlburt and marked as an A-37B in the Vietnam War.