Only one nuclear-powered submarine can claim to have sunk an enemy vessel. That would be the UK's Royal Navy's Churchill-class fleet submarine HMS Conqueror, which engaged and sank the Argentinean Navy cruiser General Belgrano during the 1982 Falklands War.
During the two World Wars, submarines sent a lot of tonnage to the bottom of the sea. German U-boats are credited with sinking 14 million tons of shipping, while the United States Navy's submarines were credited with sinking 1,314 enemy warships in the Pacific – or roughly 55% of all Axis power military vessels lost in the war. In addition, the U.S. Navy's subs sank 5.3 million tons of shipping during the War in the Pacific.
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