Both sides, the Allies and the Axis, had submarines when WW2 started.
World War 1
Germany made the first submarines in WW1. They were called U-Boats, short for "unterseeboat" Most modern submarines are descended from The Holland, christened in 1897, invented by John Holland.
About 2,100 by many different countries.
The Germans were the first to use Submarines in World War 1. Now i believe that the marines now do at times.
Why don't you just Google "World War 1 Submarines?"
'U-boats' was the name given to German submarines in both the first and second world war.
Germany was first to use submarines in World War 1 knwn as " U- 2 ". Later on UK and USA produced their own version. - b sharma.
No, not really, submarines were first used successfully in the Civil War.
World War I submarines were primarily used to locate and attack surface cargo and warships.
All submarines were built from steel. Except Bushnell's Turtle in 1776, that was made of wood & leather.
Submarines changed war. They played a big part of World War I and II.
They were much smaller in World War II. Even the crews quarters where cramped. The air exchange and diesel fumes, along with the batteries, made it dangerous and rough.