The American destroyer was steaming alone in the Atlantic, 25 miles from Bishop Rock, off the southwest coast of Britain, unaware that it was being stalked by a U-boat, an enemy submarine.

UC-47 was rammed and hit with a depth charge by HMS P-57 in a surprise attack 20 miles out to sea on 18 November 1917. Previously it had been regarded as a "lucky vessel" within the German ...

More than 500 of the ship's crew died when it was attacked by a German U ... attack in the early stages of the war was an early indication of the Royal Navy’s vulnerability to German U-boats ...

Near the end of WWI Germany, was still putting new submarines into the Atlantic. A U-boat called the SM UC-97 was ...

During WWII, Germany built 1,162 destructive "U-boats," which is short for the German word "Unterseeboot," or undersea boat. By April 1917, 430 Allied and civilian vessels were sunk by German U-boats.