WWI The First Modern War: The Germans Engage In Unrestricted Submarine Warfare | History
Second World War in the Atlantic - U-Boat [HD Colour]
U-boats off the Texas Coast in World War II
Lost Ships XXIV: The First Battle of the Atlantic
(WWI) Surfaced U-boat Sinking Merchant Ship
The Atlantic U-boat campaign of World War I was the prolonged naval conflict between German submarines and the Allied navies in Atlantic waters—the seas around the British Isles, the North Sea and the coast of France.