Book of the Week
Allied Warships
Check out our new extensive section on all the Allied Warships during WWII in all theatres of the war.Over 11.300 ships
The U-boats of World War One
1914-1918
Just like in WWII Germany deployed a large U-boat force agaist the western powers. But the main difference during the two wars was that in World War One the Germany Navy had a very large surface (battleships, destroyers, cruisers) fleet while in WWII the U-boats had to shoulder the fight pretty much alone.
List of all WWI U-boats
We list them as U, UB and UC classes.
U-boat types
See the 29 types of U-boats used in the war.
U-boat finder
Look for any commissioned WWI U-boat(including Austrian-Hungarian)
Some statistics:
U-boats during WWI: 375U-boats during WWI: 1153
During 1914-1918 274 U-boats sank about 6.596 merchant ships (12.800.733 tons).
5 most successful U-boats
| U 35 | 224 ships | 539.741 tons |
| U 39 | 154 ships | 404.478 tons |
| U 38 | 137 ships | 299.985 tons |
| U 34 | 121 ships | 262.886 tons |
| U 33 | 84 ships | 229.598 tons |