The many bases were needed for the logistics needs of the troops around the world. During World War 2, in Guam alone one million gallons of aviation gasoline were needed each day. Fuel for ships, airplanes and vehicles was in much demand, 25,000,000 barrels of fuel was shipped to Pacific bases in just June 1945. Large storage depots with fuel, ammunition, food, and other consumable supplies. Advance Bases īuilt at the bases were personnel housing, piers, roads, shops, power plants, water plants. A few Naval Advance Bases were built for the Korean War and Vietnam War. Seabees could build new or repair damaged runways, and with advancements in heavy bomber technology lengthen runways as needed. The US Army and United States Coast Guard also operated out of many of these facilities. The Seabees in World War II built most of the airfields used by the United States Army Air Forces and United States Marine Corps, as they had the ships and cranes needed to transport the vast amount of equipment needed at the advance bases. At the start of the war civilian contractors were employed in construction. Most Advance Bases were built by the US Navy's Seabees in Naval Construction Battalions (CBs). A few bases also were developed to be R and R for all U.S. The Seabees developed auxiliary floating drydocks were able to repair battle damage and do regular maintenance in the field saving ships trans-pacific trips for repair. The larger bases could do refueling and overhaul loading of troopship and cargo ships and preparing amphibious assault ships. PT Boats typically would get a Cub and airfields with single runways were Acorns. Lions and Oaks were major facilities while Cubs and Acorns were minor. Naval bases were either Lions or Cubs while airfields were either Oaks or Acorns. Navy Seabees built over 400 advance bases categorized by size. Navy had a single fleet-sized advanced base in the Territory of Hawaii at Naval Station Pearl Harbor. Before Japan declared war on the United States the U.S. Advance bases provided the fleet with support to keep ships tactically available with repair and supply depots of facilities, rather than return them to the continental United States. A few were built on Allied soil, but most were captured enemy facilities or completely new. US Naval Advance Bases were built globally by the United States Navy during World War II to support and project U.S. Overseas US Naval Bases Naval Advance Base Espiritu Santo docks, now part of the City of Luganville

Us naval submarine bases