Russia’s Improved Kilo II submarine is one of the quietest diesel-electric submarines in the world. Designed for stealth, it ...

The Sierra I submarine was one of the most advanced Soviet attack submarines of the Cold War. Built with a titanium hull, it could dive deeper than most submarines while remaining relatively quiet ...

A US submarine torpedoed and sank an Iranian warship off the coast of Sri Lanka on Wednesday, the Pentagon said, as more nations were sucked into the Middle East war.On another front, Iran's ...

The March 4 incident in the Indian Ocean marked the first time an American submarine had torpedoed an enemy vessel since the last days of World War II.

The U.S. military has intensified operations in Iran, sinking an Iranian warship and striking thousands of targets, as the ...

NEW DELHI (AP) — The United States and Iran have offered sharply different accounts of the sinking of an Iranian warship in ...

A widening U.S.-Israeli war with Iran has seen major strikes, missile fire across the region, and fresh fears for global ...

More than 140 crew members are missing after an Iranian warship was sunk by a US submarine off the coast of Sri Lanka.

A U.S. submarine sank an Iranian warship in international waters, Defense Secretary Pete Hegseth said Wednesday. In addition to striking Tehran, Israel hit the Iranian-backed Hezbollah militant group ...

THIS is the astounding moment a US submarine torpedoed and sunk an Iranian war ship in the Indian Ocean. Incredible footage released by the Department of War shows huge flames rising from the ...

Meanwhile, President Donald Trump has told a White House event the US is striking Iranian drone and missile systems "every single hour".

The U.S. and Israel struck Tehran and other Iranian cities in airstrikes on the fifth day of the war with Iran. Here's what you need to know.