A look at the sheer scale, history, and evolution of 10 of the biggest military submarines ever made, from early experiments ...

It was on April 6 in 1917, that the United States abandoned its stance of neutrality and officially joined the Allied powers ...

Under the command of Lt. Cmdr. Maurice Jester, the cutter Icarus sank a German submarine in less than an hour.

A 110-year-old lemon used by a German WW1 spy to send secret messages from Britain with invisible ink is going on display in ...