The First Fleet was a unit of the United States Navy, in operation from as early as 1946 (but definitely active by 1948 as the First Task Fleet) to 1 February 1973 in the western Pacific Ocean as part of the Pacific Fleet. In 1973, it was disestablished and its duties assumed by the Third Fleet.
Vice Admiral A. E. Montgomery was named as Commander, First Task Fleet, in an air station report of July 1947, with an inspection visit by a group of senior officers. The old cruiser Salt Lake City was sunkas an atomic bomb test target during First Task Fleet manoeuvers in May 1948.USS Salisbury Sound became the flagship of Vice Admiral G.F. Bogan (Commander First Task Fleet) on 25 March 1949. USS Curtiss served as flagship for Commander First Fleet early in 1949 for three weeks of amphibious operations in Alaskan waters to evaluate cold weather equipment. USS Helena served as flagship for Commander, First Fleet, from January 1960-March 1963. USS Providence served as flagship in San Diego from 1969 until April 1972, except for yard overhaul in 1970 when USS Chicago assumed the role.