On 16 January 1968 Air Defense Command was re-designated Aerospace Defense Command (ADCOM) as part of a restructuring of USAF air defense forces. Fourth Air Force's second period of service was short lived, however, and the command was again inactivated as the result of a major ADCOM reorganization on 31 December 1969 of the First Fourth, Tenth Air Forces and several Air Divisions. This reorganization was the result of the need to eliminate intermediate levels of command in ADCOM driven by budget reductions and a perceived lessening of the need for continental air defense against attacking Soviet aircraft.