NATO has expanded its footprint in the North Atlantic, partially in response to an increased Russian submarine presence.

The internet exploded with dramatic headlines claiming a Russian submarine surfaced dangerously close to HMS Queen Elizabeth, Britain’s flagship aircraft carrier. Videos with millions of views ...

Add Yahoo as a preferred source to see more of our stories on Google. A Russian submarine was deployed alongside a spy ship to map critical undersea infrastructure around Britain, it has emerged. An ...

Add Yahoo as a preferred source to see more of our stories on Google. President Volodymyr Zelensky of Ukraine visits the White House on Oct. 17. On Monday, the Ukrainian Security Service announced 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 ...

Norway's Minister of Defense Tore O. Sandvik, left, and Britain's Secretary of State for Defense John Healey during the signing of a Strategic Defense Agreement in London, Thursday, Dec. 4, 2025. (AP ...

This is not the first time the Royal Navy and NATO have had to scramble ships and aircraft to track Russian vessels passing through the English Channel on their way to the Atlantic Ocean. This week, ...

Oct. 15 (UPI) --The Swedish military deployed fighter jets and a warship to shadow a Russian submarine after it entered the Baltic Sea on Tuesday and continues sailing toward a Russian port. The ...

India's ambition for indigenous nuclear-attack submarines faces a ten-year wait. The first vessel is projected for 2036. A ...