During World War II, German submarines, or U-boats, wreaked havoc on Allied shipping. Using tactics and stealth and aided by intelligence reports on the merchant vessels, U-boats targeted these ...

During World War II, U.S. Navy cruisers filled a vital niche between the powerful but slow battleships and the less powerful ...

During World War II, German U-boats dealt significant damage to Allied shipping. The submarines used stealth and strategic tactics, augmented by intelligence gathered on merchant vessels, to ...

The U.S. vessel was sunk by a German submarine during World War II. PROVIDED PHOTO BY ASSOCIATED PRESS/OCEAN EXPLORATION TRUST Ballard's photos show that the U-boat itself was broken in two by the ...

This undated photo, provided by the National WW II Museum in New Orleans, shows Oberleutnant zur See Hans-Gunther Kuhlmann, center, saluting commander of the German U-boat U-166 on his boat.

The 36-foot boat carried U.S. troops during the invasion of Sicily and the Battle of Tarawa in the Pacific, officials said. How it ended up in Lake Shasta is a mystery.

Wreck of Irish fishing vessel sunk by U-boat in World War II finally found off Donegal coast. John Kearney in his submersible which he dived to search for the wreckage in. Photo: Lishen Wei.