What's the Fascination with U-boats?

[Chef]

Originally Posted by GoldenRivet

The German U-Boat fleet:

for starters it was the deadliest submarine warfare unit in the history of war, the Type VII u-boat has in fact been referred to as "the deadliest weapon of war ever devised" by more than one historian.

To be honest, almost as deadly to its own crews as it was to the Allies in numbers. In percentage, much deadlier to its own crews.