REUTERS—A U.S. submarine sank an Iranian warship off the southern coast of Sri Lanka, killing dozens of sailors and dramatically widening Washington’s pursuit of the Iranian navy. Sri Lanka’s deputy ...

A chilling echo from history just reverberated across the oceans. Pentagon officials have confirmed an event that hasn't happened in generations: a U.S. Navy submarine has sunk an Iranian warship. A ...

Submarines will spend hours or days tracking enemy vessels before carefully lining up a torpedo shot. Earlier this month, a US Navy submarine sank the Iranian frigate IRIS Dena off the coast of Sri ...

A U.S. submarine used a torpedo to sink and Iranian ship in the Indian Ocean Tuesday, the first such attack since WWII , the Pentagon said.