The L-class submarines made up a large portion of the Atlantic fleet, and they served throughout the war. The USS L-1 (SS-40) featured a diesel-electric engine, which made it capable of reaching ...

After more than 100 years, we have the first actual image of the wreck of a sunken U.S. Navy submarine from World War I. A recent expedition to survey it and other lost military hardware has ...

This caused World War II submarines to spend most of their time on the surface. For example, American submarines spent roughly 90% of their combat missions above the surface.

By World War One, submarines had come a long way. The Germans used U-boats (Unterseeboot) to attack allied shipping in the Atlantic.

The L-class submarines made up a large portion of the Atlantic fleet, and they served throughout the war. The USS L-1 (SS-40) featured a diesel-electric engine, which made it capable of reaching ...