The same way they do today, they took saltwater into tanks while underwater, evaporated out the salt and electrolyzed the oxygen out of it. They also carried tanks of compressed air in the submarine.
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.
4
Yes, they had crews.
Horses, trains, boats, ships, submarines, hot air balloons, carts, wagons.
The civil war was the first modern war. They had repeating rifles, submarines, military ambulances, hot air balloons for spying, barbed wire, flame throwers, just to name the few.
the battle of butthed island
Both the Union and the Confederate had submarines, but the Confederate used them more often.
submarines
As an ingenious new method of sinking warships.
One primitive submarine was used in the Civil War. It destroyed a Union ship but the sub also sank after its only attack.
The confederacy. they had several subs. the north had only one, the Alligator.