Germany's U-505 submarine was the 1st warship captured by the US Navy in over a century and top secret during World War II. See photos of the inside.

Why did the U-boat attack the Leukos? The Leukos had been fishing alongside five British trawlers off Tory Island on 9 March 1940 when the submarine surfaced and opened fire with its deck gun.

The calm morning waters of the North Sea turned into a nightmare for the British Royal Navy as the German U-boat U-9, under ...

Just weeks before World War I ended, a German U-boat attack turned the Irish Sea into a graveyard, claiming over 500 lives in the deadliest maritime disaster in Irish waters, the sinking of RMS ...