The CSS Hunley, a Confederate submarine, made history as the first successful submarine attack on February 17, 1864, sinking the USS Housatonic. The story of its construction, testing, and mysterious sinking remains a topic of debate, with some believing it was due to small arms fire or a malfunctioning mine. The Hunley's remains were later found and are now undergoing conservation, with plans to display it on permanent exhibit.
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