On October 15, 1863, the H.L. Hunley, the world’s first successful combat submarine, sinks during a test run, killing its inventor and seven crew members.
Horace Lawson Hunley developed the 40-foot submarine from a cylinder boiler. It was operated by a crew of eight—one person steered while the other seven turned a crank that drove the ship’s propeller. The Hunley could dive, but it required calm seas for safe operations. It was tested successfully in Alabama’s Mobile Bay in the summer of 1863, and Confederate commander General Pierre G.T. Beauregard recognized that the vessel might be useful to ram Union ships and break the blockade of Charleston Harbor. The Hunley was placed on a railcar and shipped to South Carolina.
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