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 ...

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.

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 ...

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.

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 ...