U-boats were German submarines. in the second world war their job was to sink merchant ships to cut oof supplies from America going to Britain.
Patrol Torpedo Boat
A U-boat was a submarine used by Germany in World War 1 and World War 2.
U-Boat , ULTRA ,U-boat, the name for German submarines during World War 2
u boat
U-Boat , Ultra ,
Kennedy.
Landing Craft.
a U-boat
U-boat
Germany by ur uncle luay
Das Boot
U-boat Zyklon-B