In that same vein, all U-boats are ... the feared German sub. Germany completed its first U-boat (the U-1) in 1905 and was the first nation to use a submarine during World War I.

After implementing a naval blockade of Germany and Austria-Hungary in August 1914, as the war dragged ... the German high command with a dilemma: they could either call off the U-boat attacks ...

Over eight decades ago, the US Navy made the historic capture of a Nazi U-boat during World War II. A treasure trove of vital German intelligence, the submarine's capture was top-secret. See inside ...

As one of the World War I allies, Japan received seven of the surrendered U-boats but went a bit beyond mere 'examination.' Japan imported some 800 German technicians, engineers, and naval ...