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    Tsis Island (Siis) Chuuk State (Truk) Federated States of Micronesia
Location
Tsis Island is locate near the center of Truk Lagoon in Chuuk State (Truk) in the Federated States of Micronesia. Also known as Siis Island. The island has a hill on the southern portion with an elevation of 248'. To the north is Fefan Island, to the east is Uman Island, to the south is Aualap Pass South Pass (South Passage) and Faleu Island. To the northwest is Tarik Island and Param Island.

Wartime History
On the highest elevation of Tsis Island, the Imperial Japanese Army emplaced a single 75mm Type 41 Mountain Gun in an open emplacement. This gun was angled to the east to provide artillery support to gun positions on Fefan Island. Tarik Island beaches were mined with ninety-two Army small model land mines to prevent landings. Occupied by the Japanese for the duration of the Pacific War.

American missions against Tsis Island
February 17, 1944 - April 30, 1944

References
WWII Wrecks of the Truk Lagoon pages 88 (map), 137, 140, 188, 190, 211, 216, 226, 515 (index)

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Last Updated
August 25, 2018

 

Map
Map
Feb 4, 1944
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