The 1st Operations Group is the oldest major air combat unit in the United States Air Force. As the 1st Pursuit Group it saw combat in World War I, and as the 1st Fighter Group combat in World War II. Pilots of the 1st Group are credited by the USAF with destroying 554.33 aircraft and 50 balloons, and 36 pilots are recognized as being aces. After 30 years of inactivation between 1961 and 1991, the group was re-activated as the 1st Operations Group, 1st Fighter Wing, equipped with both F-15 Eagle and F-22 Raptor fighters.