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Yap Island is the largest island in the Yap island group surrounded by the Pacific Ocean. Also known as "Yappu". To the east is Gagil-Tamil Island and to the northeast is Maap Island and Rumung Island. Prewar and during the Pacific War part of the Caroline Islands. Today located in Yap State in the Federated States of Micronesia.
After the Spanish-American War, Germany administered the Caroline Islands. During World War I in 1914, British warships shelled the German colonial plantation owner's radio station. On October 7, 1914, a Japanese Expeditionary Squadron landed on Yap and occupied the island. Afterwards, a secret treaty agreement between Japan and Britain guaranteed Japanese control over all Pacific islands north of the Equator was incorporated into the Treaty of Versailles in 1919.
By 1920, Japanese settlement began on Yap. After 1935, when Japan withdrew from the League of Nations, Yap was fortified as a military base. During the Japanese occupation, Yapese natives were forced to work in labor gangs at nickel, bauxite and phosphate mines on the island.
During the Pacific War, the Japanese build a lighthouse at Gagil and intensive gardening begins in a large portion of southern Yap. At the end of March 1944 Yap Island came within range of American B-24 Liberators that bombed the island until the end of October 1944.
American missions against Yap
March 30, 1944–October 30, 1944
On August 13, 1944 off Yap, USS Burrfish (SS-312) landed U. S. Navy (USN) frogmen from Underwater Demolition Team 10 (UDT 10). After the landing, three were captured: Howard L. Roeder, John C. MacMahon and Robert A. Black, the only frogmen ever taken Prisoner Of War (POW). On August 23, 1944 at 4:30pm the three were transported aboard submarine chaser No. 27 Kise Maru to Palau. On September 2, 1944 they were transported aboard special sub-chaser Uruppu Maru from Palau via Davao to Manila.
Colonia (Doanguuc, Korronii, Kolonie, Yap, Yappu)
located on southern Yap Island includes Colonia Airfield and Tomil Airfield.
Ditched in shallow water off Yap.
B-24J Liberator Serial Number 44-40598
Pilot Coleman MIA June 25, 1944 shot down by fighters
B-24J Liberator Serial Number 44-40555
Pilot Sylor MIA July 15, 1944 mid air collision with B-24J 42-73119 roughly 5-8 miles south of Yap.
B-24J Liberator Serial Number 42-73119
Pilot Diederich MIA July 15, 1944 mid air collision with B-24J 44-40555 roughly 5-8 miles south of Yap.
Yap's Air Campaign by Richard Dunn
MissingAircrew - American Missions Against Yap, 13 August 1944
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