The Battle of Peleliu, codenamed Operation Stalemate II by the US military, was fought between the United States and Japan during the Mariana and Palau Islands campaign of World War II, from 15 September to 27 November 1944, on the island of Peleliu.
The Mariana and Palau Islands campaign, also known as Campaign Plan Granite II, was an offensive launched by United States forces against Imperial Japanese forces in the Pacific Ocean between June and November 1944 during the Pacific War. The campaign consisted of Operation Forager, which captured the Mariana Islands, and Operation Statemate, which captured Palau. Operation Causeway, the invasion of Taiwan was also planned but not executed. The offensive, under the overall command of Chester W. Nimitz, followed the Gilbert and Marshall Islands campaign and was intended to neutralize Japanese bases in the central Pacific, support the Allied drive to retake the Philippines, and provide bases for a strategic bombing campaign against Japan.
The Battle of Angaur was a major battle of the Pacific campaign in World War II, fought on the island of Angaur in the Palau Islands from 17 September to 22 October 1944. This battle was part of a larger offensive campaign known as Operation Forager which ran from June to November 1944 in the Pacific Theater of Operations, and Operation Stalemate II in particular.
Peleliu Airfield is a small airfield on Peleliu, one of the islands of Palau. It also served as an airfield during World War II.
East Field is a former World War II airfield on Saipan in the Mariana Islands, part of Naval Advance Base Saipan.
Angaur Airstrip is a small airstrip on Angaur, one of the islands of Palau. It also served as an airfield during World War II.
The 864th Bombardment Squadron is an inactive United States Air Force unit. Its last assignment was with the 494th Bombardment Wing at Sheppard Air Force Base, Texas, where it flew Boeing B-52 Stratofortresses under Strategic Air Command. It was inactivated on 2 April 1966.
The 865th Technical Training Squadron is an inactive United States Air Force unit. Its last assignment was with the 1st Missile Division at Redstone Arsenal. Alabama, where it trained Italian Air Force personnel on the SM-78 Jupiter. It was inactivated on 1 November 1959.
The 866th Bombardment Squadron is an inactive United States Air Force unit. Its last assignment was as the 866th Technical Training Squadron with the 1st Missile Division at Redstone Arsenal, Alabama, where it trained for overseas deployment the SM-78 Jupiter. It was inactivated on 25 May 1962.
Nanumea Airfield is a former World War II airfield on the island of Nanumea in the Ellice Islands.
Marine Fighter Squadron 541 (VMF-541) was a reserve fighter squadron of the United States Marine Corps. Originally commissioned during World War II as a night fighter unit flying the F6F-5N Hellcat, the squadron participated in combat action over Peleliu and while supporting the liberation of the Philippines in 1944–45. During the war, VMF(N)-541 was credited with downing 23 Japanese aircraft. Following the war, the squadron participated in the occupation of Northern China until returning to the States to be decommissioned on 20 April 1946. The squadron was reactivated sometime after the war in the Marine Corps Reserve until being decommissioned again in the early 1960s.
US Naval Advance Bases were built globally by the United States Navy during World War II to support and project U.S. naval operations worldwide. 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 the continental United States. Before Japan declared war on the United States the U.S. Navy had a single fleet-sized advanced base in the Territory of Hawaii at Naval Station Pearl Harbor. During the war the U.S. 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 provide 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 civilian contractors 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 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 of the Coral Sea, 1,469 kilometres 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 an anchorage for large ships. Noumea was protected against submarine attack by a 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. Nouméa is the capital city of New Caledonia. On November 8, 1942, US Navy South Pacific headquarters moved to Nouméa.
Naval Base Okinawa, now Naval Facility Okinawa, is a number of bases built after the Battle of Okinawa by United States Navy on Okinawa Island, 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 Seabees 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 by 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 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 Fiji was a naval base built by the United States Navy in 1942 to support the World War II effort. The base was located on Fiji in the Central Pacific Ocean. The base was built as one of many advance bases in the island-hopping campaign towards the Empire of Japan. The US Navy built seaports, seaplane bases and airfields used for staging in the Pacific War.
Naval Base Kwajalein was United States Navy base built on Kwajalein Atoll, in the Marshall Islands to support the World War II efforts in the Pacific War. The base was built after the Battle of Kwajalein ended 3 February 1944. The US Navy built airfields, a seaport and a craft repair depot on the captured islands. The base was part of the vast Naval Base Marshall Islands.
US Naval Base Carolines included a number of United States Navy bases on the Caroline Islands in the western Pacific Ocean, to the north of New Guinea during World War II. The bases were built to support the island hopping Pacific War efforts of the allied nations fighting the Empire of Japan.
United States Navy 
