Typically, when people think of submarine warfare, they probably recall the deadly U-boats of World War II. While that conflict saw widespread use of submarines, it was hardly the first to utilize the ...

HMAS AE1 was Australia's first WWI submarine, which mysteriously vanished in 1914, becoming the country's greatest naval mystery for over a century. After a 103-year search, the submarine was finally ...

A World War I submarine wreck off the coast of Southern California has been captured for the first time in new video and images made possible using advanced deep-sea imaging technology. The ...

In the midst of the First World War, three U.S. submarines were performing training exercises off the coast of San Diego when they entered a fog bank. Two of them crashed, sending the USS F-1 ...

Decades before Tom Clancy wrote “The Hunt for Red October,” an Italian naval officer pulled off a stunt that could have come straight from a Cold War spy novel — he stole a submarine to spark a war.