Yes, submarines were used by the Confederate Navy in the US Civil War.
No, not really, submarines were first used successfully in the Civil War.
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Both the Union and the Confederate had submarines, but the Confederate used them more often.
submarines
As an ingenious new method of sinking warships.
During World War 2, it is reported that over 2,000 variants of Japanese Submarines were used during World War 2. Out of this, it is estimated that 10,000s were likely to be used during WW2.
One primitive submarine was used in the Civil War. It destroyed a Union ship but the sub also sank after its only attack.
Britain, France, Germany, Italy and USA all used submarines during WW1
Chloroform was used to as an anesthesia during the Civil War.
Yes, they had crews.
An estimation of about 600 subs were operated during the war.
ASDIC