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

These rules have developed over centuries as states sought to regulate the conduct of conflict at sea while still allowing navies to operate effectively.

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

The Torsk's sinking of the Japanese vessel marked the last U.S. submarine kill for over eight decades - that is until March 3, 2026.

Lockheed secured a potential $480 million Navy contract for AN/SQQ-89A(V)15 anti-submarine warfare system engineering support.

Norway just struck a major $13.5 billion deal with the UK to acquire new Type 26 frigates. The frigates specialize in anti-submarine warfare, a key operation in the North Atlantic. A NATO official said the warships will give Norway and the alliance a major ...

Submarines have been used in warfare for centuries. Undersea warfare has come a long way since the first experimental contraptions took to the seas. The modern nuclear-powered submarine represents a huge investment in money, resources, and time. There is ...

China's submarine fleet is improving, making advancements in stealth. In a war, China's subs could put up a tough fight in the First Island Chain, analysts say. China has also prioritized sensors and other anti-submarine warfare capabilities in the region.

The USS Lionfish was commissioned in 1944 and earned one battle star for service in World War II. It sank a Japanese submarine, rescued the crew of a B-29 bomber, and served as a training submarine. The Balao-class submarine is now a museum docked at Battleship Cove in Fall River, Massachusetts.

The introduction of the submarine to naval warfare reshaped planning and doctrine. While typical engagements relied on guns and precision, the submarine didn’t need to concern itself with being as well armed as a dreadnought or destroyer. It could strike ...

The US submarine strike on an Iranian warship in the Indian Ocean marked a sharp escalation in the war between the two nations, raising fresh security and economic risks across the Indo-Pacific.