Researchers have discovered the USS F-1, a World War I-era submarine, which had been lost at sea for 108 years.

Memorial Day is when we pause and honor those who gave their lives for our freedom. How much do you know about America’s ...

On a foggy December morning in 1917, three U.S. Navy submarines crept through the waters off the coast of San Diego. They ...

German submarines sank 56 Allied ships in the region and damaged another 14, losing just one of their own in the process ...

When the German U-boats targeted the Lusitania with a torpedo, the ship sank more quickly than expected. Here's why that ...