The Battle of Hollandia was an engagement between Allies of World War II and Japanese forces during World War II. The majority of the Allied force was provided by the United States, with the bulk of two United States Army infantry divisions being committed on the ground. Air and naval support consisted largely of U.S. assets, although Australia also provided air support during preliminary operations and a naval bombardment force.
Naval Advance Base Espiritu Santo or Naval Base Espiritu Santo, most often just called Espiritu Santo, was a major advance Naval base that the U.S. Navy Seabees built during World War II to support the allied effort in the Pacific. The base was located on the island Espiritu Santo in the New Hebrides, now Vanuatu in the South Pacific. The base also supported the U.S. Army and Army Air Corps, U.S. Coast Guard, and US Marine Corps. It was the first large advance base built in the Pacific. By the end of the war it had become the second-largest base in the theater. To keep ships tactically available there was a demand for bases that could repair and resupply the fleet at advance locations, rather than return them to the United States. Prior to December 7th, Pearl Harbor was the U.S. fleet's largest advance base in the Pacific. Espiritu became capable of all aspects necessary to support the Fleet's operations from fleet logistics in fuel, food, and ammunition, to transport embarkation for combat operations or returning to the continental United States. The ship repair facilities and drydocks were capable of attending to most damage and routine maintenance. Had it not existed, ships would have had to return to Pearl Harbor, Brisbane, or Sydney for major repairs and resupply. The base became a major R and R destination for the fleet.
US Naval Advance Bases were built globally by the United States Navy during World War II to support and project U.S. naval operations world-wide. A few were built on allied soil, but most were captured enemy facilities or completely new. Advance bases provided the fleet with support to keep ships tactically available with repair and supply depots of facilities, rather than return them to continental United States. Before Japan declared war on the United States the US Navy had a single fleet sized advanced base in the Territory of Hawaii. It was Naval Station Pearl Harbor. During the war the US Navy Seabees built over 400 advance bases categorized by size. Naval bases were either Lions or Cubs while airfields were either Oaks or Acorns. Lions and Oaks were major facilities while Cubs and Acorns were minor. PT Boats typically would get a Cub and airfields with single runways were Acorns. The larger bases could do refueling and overhaul; loading of troopship and cargo ships; and preparing amphibious assault ships. Some became major repair depots. 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. A few bases also were developed to be R and R for all U.S. personnel. Most Advance Bases were built by the US Navy's Seabees in Naval Construction Battalions (CBs). At the start of the war some civilian contractor were employed in construction. 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. The US Army and United States Coast Guard also operated out of many of these facilities. Seabees could build new or repair damaged runways, and with advancements in heavy bomber technology lengthen runways as needed. A few Naval Advance Bases were built for the Korean War and Vietnam War.
Naval Base Saipan or Naval Advance Base Saipan or Naval Air Base Saipan was a United States Navy Naval base built during World War II to support Pacific Ocean theater of war and the many warships and troops fighting the war. The base was on the island of Saipan in the Northern Mariana Islands. The base was part of the Pacific island hopping campaign. The base construction started after the Battle of Saipan ended on July 9, 1944. US Naval Advance Base Saipan was constructed by the Seabees Naval Mobile Construction Battalions. The base was under the Commander Naval Forces Marianas. Saipan is 12 miles (19 km) long and 5 miles (8.0 km) wide. About 70% of the island was sugarcane cultivation at the start of the base construction. At the start of the Battle of Saipan, the island's population had about 30,000 Japanese troops and about 20,000 Japanese civilians. The city of Garapan was the administrative center for the Saipan governmental district.
Naval Base Noumea was a major United States Navy sea and air base at Nouméa, New Caledonia. Naval Base Noumea was built at Noumea Harbor. Noumea was picked for a Naval Base as it was beyond the range of Japanese land-based planes. Noumea is on the east side the Coral Sea, 1,469 km, from Brisbane, Australia. The Base was built during World War II to support the many ships and aircraft fighting and patrolling in the South West Pacific theatre of war as part of the Pacific War. Naval Base Noumea had anchorage for large ships. Noumea was protected against submarine attack by ring of islands and Naval minefields. At its peak 50,000 Troops were stationed at Naval Base Noumea. New Caledonia has been a colony of France since 1853. Noumea is the capital City of New Caledonia on the southwest end of the island. On November 8, 1942, US Navy South Pacific headquarter moved to Noumea.
Naval Base Milne Bay, also called Naval Advance Base Milne Bay, was new major United States Navy sea and airbase base built on Milne Bay in Milne Bay Province in south-eastern Papua New Guinea. By spring 1943, the build up of the US Navy to support the Pacific War had caused overcrowding at the ports on the east coast of Australia. To help the Seabee departed Naval Base Brisbane on June 19, 1943 to set up a new base in Milne Bay. Naval Base Milne Bay headquarters was at Ladava Navy Base. The Royal Australian Navy already had a small base in Milne Bay: HMAS Ladava. Australians were able to defend and keep Milne Bay in the Battle of Milne Bay in 1942. Naval Base Milne Bay was built during World War II to support the many ships and aircraft fighting and patrolling in the South West Pacific theatre of war. Ladava Navy Base provided a large protective US Navy fleet anchorage at Gahora Bay next to Ladava. At Naval Base Milne Bay Seabee built large Naval facility.
Naval Base Manila, Naval Air Base Manila was a major United States Navy base south of the City of Manila, on Luzon Island in the Philippines. Some of the bases dates back to 1898, the end of the Spanish–American War. Starting in 1938 civilian contractors were used to build new facilities in Manila to prepare for World War II. Work stopped on December 23, 1941, when Manila was declared not defendable against the Empire of Japan southward advance, which took over the city on January 2, 1942, after the US declared it an Open city. US Navy construction and repair started in March 1945 with the taking of Manila in the costly Battle of Manila ending on March 2, 1945. Naval Base Manila supported the Pacific War and remained a major US Naval Advance Base until its closure in 1971.
Naval Base Okinawa, now Naval Facility Okinawa, was and is a number of bases built after the Battle of Okinawa by United States Navy on the Okinawa Island of Japan. The naval bases were built to support the landings on Okinawa on April 1, 1945, and the troops fighting on Okinawa. The Navy repaired and did expansion of the airfields on Okinawa. United States Navy Seabee built or repaired the facilities on the island. The bases on Okinawa put the United States Armed Forces only 350 miles from Japan's home islands. Most facilities closed after the war, but some are still in use today in all branches of the United States Armed Forces.
Manus Naval Base was a number of bases built after the World War II Battle of Manus by United States Navy on the Manus Island and a smaller island just east, Los Negros Island in the Admiralty Islands chain. The major naval base construction started with the Los Negros landings on February 28, 1944. The Navy repaired and did the expansion of the airfields on the Admiralty Islands. United States Navy Seabee built or repaired the facilities on the islands. The large Manus Naval Base, also called the Admiralty Island base, supported United States Seventh Fleet, Southwest Pacific command, and part of the Pacific Fleet. The base was abandoned by the US Navy after the war.
Naval Base Brisbane was a major United States Navy base built in the early part of World War II at Brisbane, Queensland, Australia. At first, operated as a base for patrol aircraft and convoy escort aircraft to protect the last leg of the Pacific War to the Southwest Pacific. As the US Navy expanded in the island hopping campaign, Naval Base Brisbane expanded to include a submarine base, repair depot, seaplane base and other facilities. US Navy operations started on April 14, 1942, and ended after the war in 1945.
Naval Base Merauke was a United States Navy base built during World War II at city of Merauke in the South Papua province of Indonesia, then Papua New Guinea. The base was 2 miles from the mouth of the Merauke River. The US Navy built a PT boat base and base dock with anchorage to support the Pacific War and the New Guinea campaign.
Naval Base Port Moresby was a United States Navy base built during World War II at the city of Port Moresby on Papua New Guinea. The US Navy built a communication center and advance base headquarters for the US Seventh Fleet to support the Pacific War in 1943. The base was part of the New Guinea campaign.
Naval Base Woodlark Island was a United States Navy base built during World War II on Woodlark Island on Papua New Guinea. The US Navy built a PT boat base, boat repair depot, and harbor facilities at the city of Guasopa to support the Pacific War in 1943. The Harbor facilities was also built to support the US Navy in building the Narewa Airfield on the island. The base was part of the New Guinea campaign.
Naval Base Finschhafen was a United States Navy base built during World War II at Finschhafen on the Huon Peninsula in Morobe Province of Papua New Guinea. The US Navy built a PT boat base, Dreger Harbor PT Boat Base, boat repair depot, and harbor facilities at Dreger Harbour and Langemak Bay to support the Pacific War in 1943. Harbor was also built to support the US Navy in building 6,000-foot Finschafen Airfield, also called Dreger Field, now Finschhafen Airport on the island. The base was part of the New Guinea campaign.
Naval Base Alexishafen was a United States Navy base built during World War II at Alexishafen, north of the city of Madang in New Guinea. The base was built by the US Navy Seabees starting June 13, 1944 as part of the New Guinea campaign of the Pacific War. The base was built at the request of the Seventh Amphibious Force of the United States Seventh Fleet to support the many boats patrolling the area. The US Navy built a boat repair depot including Auxiliary floating drydocks. The base was closed in January 28, 1945.
Naval Base Banika Island was a United States Navy base built during World War II on Mbanika Island in the Russell Islands, part of the Solomon Islands. A larger supply depot was built to support the ships fighting in the Pacific War. Also built were a repair base for landing craft, PT boats, and other boats. Banika Island offered excellent fleet anchorage. Banika Island was taken during the Solomon Islands campaign. Also at the base was built the Renard Sound Seaplane Base.
Naval Base Puerto Princesa, Naval Base Palawan, was a United States Navy base built during World War II at Puerto Princesa on Palawan Island, Philippines, after the Invasion of Palawan on February 28, 1945. Puerto Princesa Bay offered an excellent base for fleet anchorage. At the naval base, US Navy Seabees built: a seaplane base, carrier aircraft fighter plane repair depot, land airfield and other base facilities.
Naval Base Marshall Islands were United States Navy advance bases built on the Marshall Islands during World War II to support the Pacific War efforts. The bases were built by US Navy after the Marshall Islands campaign that captured the islands from the Empire of Japan. By February 1944 the United States Armed Forces had captured the islands. Most of the airfields and other facilities Japan had built were destroyed in allied bombing raids and naval bombardment. US Navy Seabee Construction Battalions arrived as soon as the area was secured and remove the debris. The Seabees quickly repaired, built and improved the airfield/runways and seaport. Seabees often worked around the clock to get airfields operational so that fighter aircraft and bombers could start operating. The bases were used for staging upcoming campaigns and for repair.
US Naval Base New Guinea was number of United States Navy bases on the Island of New Guinea during World War II. Australia entered World War II on 3 September 1939, being a self-governing nation within the British Empire. The United States formally entered the war on 7 December 1941, following the Empire of Japan bombing of Pearl Harbor. Following the attack on Pearl Harbor Japan quickly took over much of the South Pacific. The United States lost key Naval Bases in the South Pacific including: Naval Base Manila and Naval Base Subic Bay lost in the 1941 invasion of the Philippines. Also lost was Naval Base Guam and Wake Atoll. As such the United States Armed Forces needed new bases in the South West Pacific for staging attacks on Japan's southern empire, the United States built bases first in Australia, then in New Guinea.
US Naval Base Solomons was a number of United States Navy bases in the Solomon Islands in the Pacific Ocean. Most were built by the US Navy Seabees, Naval Construction Battalions, during World War II as part of the Pacific War. In August 1942 the United States Armed Forces took the Guadalcanal in the Solomon, in the Battle of Guadalcanal. US Navy Seabees built a new base at Guadalcanal, Naval Base Guadalcanal and then on other islands in the Solomons.
United States Navy 
