Since 1991, Navy subs have launched scores of cruise missiles in combat, but the torpedo attack off Sri Lanka is a return to form after 80 years.

Defense Secretary Pete Hegseth calls Iranian warship sinking a message that 'gloves are off' as U.S. nuclear submarine ...

In the dark waters outside Alexandria in the early 1940s, a handful of Italian divers rode slow, unstable machines that looked more like plumbing projects than weapons. Their mission was to slip ...

After a U.S. submarine sank Iran’s IRIS Dena with a Mk 48 torpedo, attention turned to the Navy’s primary undersea weapon that first entered operational service in 1972.