The USS Thresher (SS-200) was a Tambor-class submarine and the most decorated U.S. Navy submarine of World War II, earning 15 battle stars and a Navy Unit Commendation. Constructed by the Electric Boat Company in Groton, Connecticut, her keel was laid on 27 May 1939, she was launched on 27 March 1940, and commissioned on 27 August 1940 under Lieutenant Commander William Lovett Anderson. Thresher measured approximately 311 feet in length, with a beam of about 27 feet, and a draft of roughly 15 feet. She was powered by diesel engines for surface running and electric batteries for submerged operations, typical of submarines of her era. Thresher's service history during WWII was extensive and highly active. She conducted numerous war patrols across the Pacific, engaging Japanese shipping and naval forces from her first patrol in late 1941 through her final patrol in 1945. Notable events include her near-destruction during her first war patrol after the attack on Pearl Harbor, where she was mistaken for a hostile submarine and fired upon by a Japanese destroyer. She also participated in reconnaissance, weather data collection, minelaying, and direct attacks on enemy vessels, sinking multiple ships including freighters and a tanker, and damaging others. Thresher also engaged in daring operations such as supplying Filipino guerrillas and conducting shore bombardments. Throughout her wartime service, Thresher demonstrated resilience and aggressive tactics, often evading enemy countermeasures despite severe depth charge attacks. Her patrols contributed significantly to the U.S. submarine warfare campaign, disrupting Japanese supply lines and naval operations. After the war, Thresher was decommissioned on 13 December 1945, and although she was briefly considered for target testing during atomic tests at Bikini Atoll, her deteriorated condition led to her final decommissioning on 12 July 1946. She was subsequently sold for scrap in 1948. As a highly decorated vessel, Thresher holds a distinguished place in U.S. naval history for her combat record and contributions to the Allied victory in the Pacific.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.