<P> The first military submarine was Turtle in 1776 . During the American Revolutionary War , Turtle ( operated by Sgt . Ezra Lee , Continental Army ) tried and failed to sink a British warship , HMS Eagle ( flagship of the blockaders ) in New York harbor on September 7 , 1776 . There is no record of any attack in the ships ' logs . </P>
<P> The first military submarine was Turtle in 1776 . During the American Revolutionary War , Turtle ( operated by Sgt . Ezra Lee , Continental Army ) tried and failed to sink a British warship , HMS Eagle ( flagship of the blockaders ) in New York harbor on September 7 , 1776 . There is no record of any attack in the ships ' logs . </P>
when was the first submarine used in war
when was the first submarine used in war
1776 During the American Revolutionary War
1776 During the American Revolutionary War