or U-boats, sunk, scuttled, captured, or otherwise lost to German forces during World War II. Here, naval historian Timothy Mulligan describes 25 of the most historically significant U-boats.

For the first half of the 20th Century, the German U-boat was the most feared warship at sea. Even Churchill admitted “[t]he only thing that ever really frightened me during the war was the U ...

At dawn on Feb. 28, 1942, according to the Navy, it was torpedoed and sunk by a German U-boat off the coast of Delaware. The crew of the USS Jacob Jones spotted the German torpedo coming at them ...

This married couple loves to explore shipwrecks, and on this day they're heading to a location that attracts divers from ...

A diary handed down through three generations has helped find the wreck of a German U-boat sunk by a secret Royal Navy Q-ship in 1917. Henrietta Sandford, from Helston, shared diaries and letters ...

UC-97 became probably the only German submarine sunk within the continental United States. One of five U-boats turned over to the U.S. Navy for post-war study, she toured the Great Lakes as part ...

Two days later, the German U-boat U-552 left the French port of St ... US merchant ships had already been sunk in the Atlantic, and in mid-October, another US destroyer was hit by a torpedo ...

UK Defence Equipment and Support (DE&S) team is heading to the South Atlantic island of St Helena to survey the wreck of a tanker sunk by a German U-boat in World War Two. RFA (Royal Fleet ...

was sunk by a German U-boat. The U-boat captain Werner Hartenstein immediately ordered the rescue of as many survivors as possible, taking 200 people on board, with another 200 in lifeboats.

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