There was historical precedent for the reassignment of C-130s to Air Combat Command. During the earliest days of Tactical Air Command (TAC), the command had carried out the "tactical" or combat airborne aspect of airlift operations, leaving the "strategic" or logistical mission to Military Air Transport Service, later redesignated Military Airlift Command (the precursor of today's Air Mobility Command) in 1966. The tactical airlift mission included logistical airlift, airborne operations, aeromedical evacuation, and air support for special operations. This division of the airlift mission continued until 1 December 1974, when TAC transferred its CONUS-based tactical airlift units, including Air Force Reserve and Air National Guard tactical airlift units, to Military Airlift Command (MAC). MAC gained the overseas units from theater commands on 31 March 1975.