06/09/1776 World's first submarine is used in combat
The Turtle: World's first submarine used in combat
The Turtle Submarine
First Combat Submarine The "Turtle" Used During Revolutionary War
Replica "TURTLE" Revolutionary War Submarine - Test #2
Full Scale "TURTLE" Revolutionary War Submarine Replica - Test #1
The vessel was designed by American inventor David Bushnell. She was called Turtle. Like modern submarines, she used water as ballast and a screw propeller. However, her attack against British ship-of-the line HMS Eagle failed. According to some sources, the story was fabricated. Turtle latter sunk with a sloop which was transporting her.