The submarines attacked Pearl Harbor
German submarines were referred to as U-boats during the world wars.
Germany
Germany used U boats.
Well, only the Germans called their submarines U-Boats, this was short for the german word unterseeboot which means submarine.
The submarines were either called "submarines" or "U-boats." The German submarine was called the "U-boat"
Germany called there submarines U boats
Underseaboats.U-boats
Britain, France, Germany, Italy and USA all used submarines during WW1
Underseaboats.U-boats
USSR; US; UK; Germany & Japan.
German submarines were referred to as U-boats during the world wars.