In 2015, a small French submarine called the Saphir snuck past the defenses of the USS Theodore Roosevelt aircraft carrier and "sunk" it in training.

President Lee Jae-myung’s request to the U.S. for nuclear-powered submarine (SSN) fuel, rather than the submarines themselves, was intended to convey, “We will build the submarines in Korea, so please provide the enriched uranium fuel.

An American nuclear submarine where one in 10 crew members is Australian has arrived at the Garden Island naval base for a month-long maintenance stopover, ahead of regular AUKUS rotations that begin in 2027.

Nuclear-powered submarines use some of the most advanced military technology in the world. These are the ones that are a cut above all the rest.

STOCKHOLM (Reuters) - Sweden has proof that a small foreign submarine was operating illegally in its waters last month, its top military officer said on Friday after a mysterious episode that triggered the country's biggest military mobilisation since the ...