Battle of Peleliu
1944 battle between the United States and the Empire of Japan in the Pacific Theater of World War II
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.
US marines of the 1st Marine Division and then soldiers of the US Army's 81st Infantry Division fought to capture an airfield on the small coral island of Peleliu. The battle was part of a larger offensive campaign known as Operation Forager, which ran from June to November 1944 in the Pacific War.
Major General William Rupertus, the commander of the 1st Marine Division, predicted that the island would be secured within four days. However, after repeated Imperial Japanese Army defeats in previous island campaigns, Japan had developed new island-defense tactics and well-crafted fortifications, which allowed them to offer stiff resistance and extended the battle to more than two months. The heavily outnumbered Japanese defenders put up such staunch resistance, often fighting to the death in the name of the Japanese Emperor, that the island became known in Japanese as the "Emperor's Island."
In the US, the battle was controversial because of the island's negligible strategic value and the high casualty rate incurred by American troops during the fighting, which exceeded that of all other amphibious operations during the Pacific War. The National Museum of the Marine Corps called it "the bitterest battle of the war for marines".
Background
By 1944, American victories in the Southwest and Central Pacific had brought the war closer to Japan, with American bombers able to strike at the Japanese main islands from air bases secured during the Mariana Islands campaign (June–August 1944). There was disagreement among the U.S. Joint Chiefs over two proposed strategies to defeat the Japanese Empire. The strategy proposed by General Douglas MacArthur called for the recapture of the Philippines, followed by the capture of Okinawa, then an attack on the Japanese home islands.
Begin with the source’s own compact description: “Battle of Peleliu” is 1944 battle between the United States and the Empire of Japan in the Pacific Theater of World War II. The dossier treats that line as a proposition to test through Battle, Peleliu and battle, not as a finished interpretation.
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Attribution, date and provenance are strongest when supported by the original work, a catalogue record and documented transmission. The source revision retrieved here is dated Sep 20, 2026. The linked authority identifier is Q609030. The Library of Congress control number is sh85099258. Authority coordinates are 7.017, 134.250. 2 of 2 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1944.
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