They did; "Iron Coffins".
i think there was a sub in the civil war, but not a very good one
There was a purpose built submarine The CSS Hunley, which was the first submarine to sink an enemy vessel in wartime. It had problems and sank, killing three different crews by the time it was lost.
3 crews!!! Good Lord!!!
kind of unfair to the guys by the third time.
must have been volunteers.
insane and courageous
All of them Very Brave Men, rest in peace.
Earlier one in the Revolutionary war.
http://www.history.com/this-day-in-history/worlds-first-submarine-attack