A Service Squadron (ServRon) was a U.S. Navy squadron that supported fleet combat units. Service Squadrons were used by the United States Navy from their inception in 1943 to as late as the early 1980s. At the time of their inception during the Second World War they allowed the US Navy to operate across the vast reaches of the Pacific ocean for extended periods of time. Service Squadrons created temporary forward bases to allow the naval squadrons to spend less time in transit and more time in the area of combat. Ulithi, a small volcanic atoll in the central Pacific, is one such example. Service Squadrons essentially created a major naval base near the area of operation. With the naval base at Ulithi to refit, repair and resupply, many ships were able to deploy and operate in the western Pacific for a year or more without returning to a major port facility. Among the vessels operating in service squadrons were tankers, oilers, refrigerator ships, ammunition ships, supply ships, floating docks and repair ships. They provided diesel, ordnance, aviation fuel, food stuffs and all other supplies. Equally important at places like Ulithi were the portable piers and floating dry docks which allowed many ships damaged by enemy action or Pacific storms to undergo repair without having to travel the thousands of miles back to a major US naval base. Ulithi was as far forward from the US naval base at San Francisco as the San Francisco base was from London, England. To have a fully functional major port in the middle of the Pacific was a significant aid to U.S. Navy operations.
The commander of the service squadron was responsible for the operation of all the ships, docks and repair yards in the squadron. The Commander was referred to as ComServRon, with the title followed by the unit designation of his Squadron, such as ComServRon 10.
Service Squadrons were slowly disbanded as fleet combat support functions were shifted to Military Sealift Command, manned by civilians in the late 1970s.
Service squadrons played a vital role in the war in the Pacific during the second world war. The Pacific ocean with its vast reaches was a significant obstacle to overcome. In considering their war in the Pacific against the United States, the Japanese had counted on the fact that the size of the Pacific Ocean would in itself be a defense. For the US Navy to conduct operations against the Japanese, all actions would necessarily be far from their home ports. Travel to the area of combat would consume the fleet's supplies of fuel and food and limit the length of time US Navy assets could operate in the Western Pacific. Japanese naval strategy ('Kantai Kessen') was built around the idea that this would present them with an opportunity to knock the US Navy out of the conflict with a single decisive action. They sought such an opportunity throughout the war.