I propose to you a new arm of war, as formidable as it is economical.
Submarine navigation, which has been sometimes attempted, but as all know without results, owing to want of suitable opportunities, is now a problematical thing no more.”
(French nautical designer Brutus de Villeroi, in a letter to U.S. President Abraham Lincoln.)
Though the “H.L. Hunley” is widely known as the first submarine to sink an enemy warship in combat, it was by no means the only submarine to come out of the American Civil War. The construction team headed by James McClintock and Baxter Watson who built the “Hunley” had already completed and tested two other designs for underwater vessels. Though there were other designs created and built south of the Mason-Line, they were by no means the only submersibles being built in North America in the 1860’s.