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Designs for underwater boats or submarines date back to the 1500s and ideas for underwater travel date back even further. However it was not until the 19th century that the first useful submarines began to appear.

The Confederates States launched the H.L. Hunley in 1863, during the Civil War. This submarine sank the U.S.S. Housatonic in the first successful submarine attack on a warship, but was lost with all hands a short time later.

It wasn't until after World War I began that the first truly practical and modern submarines were constructed.

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14y ago

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