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 6th Marine Division was a United States Marine Corps World War II infantry division formed in September 1944. During the invasion of Okinawa it saw combat at Yae-Take and Sugar Loaf Hill and was awarded a Presidential Unit Citation. The 6th Division had also prepared for the invasion of Japan before the war ended. After the war it served in Tsingtao, China, where the division was disbanded on April 1, 1946, being the only Marine division to be formed and disbanded overseas and never set foot in the United States.
This is the order of battle for the Guadalcanal Campaign, called Operation Watchtower, the first major Allied offensive in the Pacific Theater of Operations in World War II. The campaign lasted from the initial American landings on 7 August 1942 until the final Japanese evacuation on 9 February 1943, a period of six months, far longer than was expected by Allied planners.
The Battle of Tinian was a battle of the Pacific campaign of World War II, fought on the island of Tinian in the Mariana Islands from 24 July until 1 August 1944. The 8,000-man Japanese garrison was eliminated, and the island joined Saipan and Guam as a base for the Twentieth Air Force.
The 3rd Marine Division is a division of the United States Marine Corps based at Camp Courtney, Marine Corps Base Camp Smedley D. Butler in Okinawa, Japan. It is one of three active duty infantry divisions in the Marine Corps and together with the 1st Marine Aircraft Wing (1stMAW) and the 3rd Marine Logistics Group forms the III Marine Expeditionary Force. The division was first formed during World War II and saw four years of continuous combat in the Vietnam War. Today, elements of the 3rd Marine Division are continuously forward deployed and forward postured to carry out the US Government's mission of a Free and Open Indo-Pacific in conjunction with its sister services.
The 4th Marine Division is a reserve division in the United States Marine Corps. It was raised in 1943 for service during World War II, and subsequently fought in the Pacific against the Japanese. Deactivated after the war, the division was re-formed in 1966 and elements of the division deployed during the Gulf War in 1990–1991, as well as during the Iraq War. It is currently the ground combat element of the Marine Forces Reserve and is headquartered in New Orleans, Louisiana, and has units throughout the United States.
The 5th Marine Division was a United States Marine Corps ground combat division which was activated on 11 November 1943 at Camp Pendleton, California during World War II. The 5th Division saw its first combat action during the Battle of Iwo Jima in 1945 where it sustained the highest number of casualties of the three Marine divisions of the V Amphibious Corps. The 5th Division was to be part of the planned invasion of the Japan homeland before Japan surrendered. Assault troops of the 5th Division were included in the Presidential Unit Citation awarded to the V Amphibious Corps for extraordinary heroism on Iwo Jima from 19 to 28 February 1945. The 5th Division was deactivated on 5 February 1946.
On 15 June 1944, United States Marine forces landed on the southwest coast of the island of Saipan in the central Marianas chain; these were followed a day later by US Army forces. This invasion was part of Operation Forager, an effort to recapture the entire Marianas chain from the Empire of Japan.
The 22nd Marine Regiment is an inactive United States Marine Corps infantry regiment. The regiment was commissioned in 1942 and was placed under the command of the 1st Provisional Marine Brigade in 1944, and the 6th Marine Division in 1945. It took part in fighting at the battles of Eniwetok, Guam, and Okinawa. The regiment also participated in the occupation of northern China following the war. 22d Marines was decommissioned in March 1946.
Engineer Special Brigades were amphibious forces of the United States Army developed during World War II. Initially designated engineer amphibian brigades, they were redesignated engineer special brigades in 1943. The 1st, 5th, and 6th Engineer Special Brigades were assigned to the European Theater of Operations. The 1st Engineer Special Brigade participated in the landings in Sicily and Italy before joining the 5th and 6th Engineer Special Brigades for the invasion of Normandy.
The I Marine Amphibious Corps, or I MAC, was a formation of the United States Marine Corps. It was created on 1 October 1942, with most of the staff transferred from Amphibious Corps, Pacific Fleet (ACPF). It was then deployed to the South Pacific Area – a U.S.-led multinational military command active during World War II that was a part of the U.S. Pacific Ocean Areas – first to Hawaii, then to New Caledonia.
William John Van Ryzin was a highly decorated officer of the United States Marine Corps with the rank of lieutenant general. He is most noted as Chief of Staff, Headquarters Marine Corps during the Vietnam War.
The American invasion of the island of Okinawa, codenamed Operation Iceberg, took place 1 April 1945. The Japanese military was determined to inflict a casualty rate so high that the U.S. government would choose not to invade the Japanese home islands. To this end, the southern portion of the island had been covered with the most extensive system of fortifications and fields of fire yet encountered in the Pacific War.
On 21 July 1944, United States Marine and Army forces invaded the island of Guam, the southernmost of the Mariana Islands chain in the Central Pacific, with the intent to take control of the island from the Imperial Japanese Army. Operation Forager II, as it was called by American planners, was a phase of the Pacific Theatre of World War II.
The 16th Antiaircraft Artillery Battalion was a United States Marine Corps antiaircraft unit that served during World War II. Formed in 1942 as the 16th Defense Battalion, its original mission was the air and coastal defense of advanced naval bases. During the war the battalion defended Johnston Island, Hawaii and Tinian and took part in combat operations at Okinawa. The battalion returned to the United States after the war and was decommissioned on 30 November 1945 at Marine Corps Base Camp Pendleton, California.
The 10th Antiaircraft Artillery Battalion was a United States Marine Corps antiaircraft unit that served during World War II. Formed in 1942 as the 10th Defense Battalion, its original mission was to provide air and coastal defense for advanced naval bases. During the war the battalion took part in combat operations in the Russell Islands and at the Eniwetok. The battalion's tank platoon also saw extensive action on New Georgia and Arundel Island. The battalion was decommissioned before the end of the war on 25 November 1944.
The 11th Antiaircraft Artillery Battalion was a United States Marine Corps antiaircraft unit that served during World War II. Formed in 1942 as the 11th Defense Battalion, its original mission was to provide air and coastal defense for advanced naval bases. During the war the battalion defended took part in combat operations in the Solomon Islands. The battalion's tank platoon also saw extensive action on New Georgia and Arundel Island. The battalion was decommissioned before the end of the war on December 15, 1944.
The 17th Antiaircraft Artillery Battalion was an antiaircraft unit in the United States Marine Corps that served during World War II. The battalion was originally formed in 1942 as the 2d Airdrome Battalion and has the distinction of being the last defense battalion formed in the Marine Corps during the war. Its original mission was to provide air and coastal defense for advanced naval bases. During the war the battalion spent significant time defending Nukufetau and took part in combat operations at Tarawa and Tinian. The battalion was decommissioned on December 6, 1945.
The 14th Antiaircraft Artillery Battalion was an antiaircraft unit in the United States Marine Corps that served during World War II. The battalion was originally formed in 1943 as the 14th Defense Battalion. Its mission was to provide air and coastal defense for advanced naval bases. During the war the battalion took part in combat operations in the Solomon Islands and on Guam. The battalion was decommissioned on June 30, 1945. Since then no other unit has carried the lineage and honors of the 14th Antiaircraft Artillery Battalion.
On 15 September 1944, United States Marine Corps forces landed on the southwestern shore of the island of Peleliu in the Palau island chain, 470 nautical miles due east of the Philippine island of Mindanao. This action, called Operation Stalemate II by American planners, was a phase in the Pacific Theatre of World War II. Whether possession of the island was necessary for the Allied cause has been the source of much controversy.
United States of America 
United States Marine Corps 
