German submarines sank an enormous amount of British and Commonwealth shipping in the Atlantic and for a time in 1916 food stocks in Britain were down to about six weeks' supply. German submarines aslo sank some neutral ships and by sinking American ships they brought the U.S. into the war.
Why don't you just Google "World War 1 Submarines?"
Commerce warfare (Guerre de Course).
World War I submarines were primarily used to locate and attack surface cargo and warships.
Submarines changed war. They played a big part of World War I and II.
During WW 1, submarines played a major part of a major war for the first time. The role of a submarine was basically to use torpedoes to sink enemy warships and cargo vessels.
not much
Yes
Submarines were sometimes referred to as submersibles.
It was World War one.
World War 1
Winston Churchill
Nothing whatsoever.