The Liberal minister of defence, Paul Hellyer, introduced a bill in the House of Commons to reorganize National Defence Headquarters. The bill became law on 7 July 1964. The armed forces were reorganized along regional lines. Maritime Command included the Royal Canadian Navy and Royal Canadian Air Force (RCAF) anti-submarine squadrons. Mobile Command consisted of the army brigade groups and RCAF ground support squadrons with helicopters, CF-5 fighters, and Buffalo transport aircraft. The remaining units were reorganized into Air Defence Command, Training Command, Material Command, and Air Transport Command. This reorganization was the first step toward complete unification of the Canadian armed forces.