 Fixed wing aircraft based at Simmons included the XVIII Airborne Corps and 82nd Airborne Division liaison planes, Grumman OV-1 Mohawk observation aircraft and the 4th ASTA (Aerial Surveillance Target Acquisition) attached to the 82nd Aviation Battalion.During July 1965 the 116th Assault Helicopter Company formed at Simmons and trained for duty in Vietnam.The company departed for Vietnam in October 1965 and joined the 11th Combat Aviation Battalion there.