The XIX Tactical Air Command (XIX TAC) is an inactive United States Air Force unit. The unit's last assignment was with the Ninth Air Force based at Biggs Field, Texas. It was inactivated on 31 March 1946. During World War II, the mission of the XIX TAC was to support General Patton's United States Third Army with tactical air support throughout during the army's advance from formation in France on 1 August 1944 until VE-Day.