German U-boats
A U-boat was a submarine used by Germany in World War 1 and World War 2.
United States Submarine Operations in World War II was created in 1949.
United States Submarine Operations in World War II has 577 pages.
The submarine.
It was a submarine in World War 1 or 2
World War 1
Yes.
It was a submarine in world war 1 or 2
Underseaboat.
they copied there butts
u boat
The first submarine wasn't invented in World War 1 but was invented in 1773 in the Revolutionary War by David Bushnell. It was called the Turtle.