WWI The First Modern War: The Germans Engage In Unrestricted Submarine Warfare | History
WWI Reason 3 German U boat Campaign
WWI Reason 3-German U-boat Campaign
U Boat U-156 Werner Hartenstein - A Tribute
Lost Ships XXIV: The First Battle of the Atlantic
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.