Heeresflieger
Some people credit this agreement for freeing the Army to develop the helicopter-based United States Army Aviation Branch established in 1983. From 1942 until 1983, Army Aviation assets were controlled by "proponent branches" based on aircraft and unit type. Beginning in 1942, when the Army Air Corps was re-designated as the Army Air Forces, light, single-engine airplanes were retained by the Army Ground Forces, and designated as "liaison" aircraft assigned to artillery units. As helicopters were introduced into Army aviation, cargo helicopters became under the proponency of the Transportation Corps, and eventually there were units of assault helicopters (Infantry Branch), attack helicopters and observation/scout helicopters (Armor Branch), "aerial rocket artillery" attack helicopters (Field Artillery Branch), observation/reconnaissance airplanes (Military Intelligence Branch), aerial medical evacuation units (Medical Service Corps), and signals/electronic intelligence airplanes (Signal Corps).