Service Force, United States Pacific Fleet, usually known as COMSERVPAC, was a service support command of the United States Pacific Fleet from 1942 until 1973.
The Service Force comprised the supply train of the fleet which includes Oilers (AO), Gasoline Tanker (AOG), Repair Ships (AR), Ammunition Ships (AE), Destroyer Tenders (AD) and Submarine tenders (AS).
Headquarters had already moved ashore from the USS Argonne (AS-10) to the Pearl Harbor Navy Yard, and later moved again to the new administration building of the Commander in Chief Pacific, in the Makalapa area outside the navy yard.
In 1973 cruisers, destroyers, amphibious ships, mine warfare vessels, and service ships in the Pacific Fleet all came under the command of Commander, Naval Surface Force Pacific.
By 2012, the Military Balance listed 5 Sacramento class fast combat support ships and Supply-class oilers (AOE) in regular U.S. Navy service, but 42 vessels in the Naval Fleet Auxiliary Force.