The Pentagon has not said which American submarine fired the torpedo, except to say it was a fast-attack submarine.

The Iranian warship that was sunk in the Indian Ocean likely didn’t have the technology needed to defend itself against submarines.

For the first time, China has outstripped U.S. nuclear-powered submarine production, an independent global security think ...

Video of a US submarine sinking an Iranian warship looked "remarkably similar" to a 1945 US submarine attack, a World War II ...

A U.S. Navy fast attack submarine sank an Iranian warship in the Indian Ocean ...

The U.S. wants to fast-track outfitting Australia with nuclear submarines under the trilateral agreement between the U.S., Australia and the U.K. to beef up Australia’s submarine force aimed at ...