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

Add Yahoo as a preferred source to see more of our stories on Google. A Russian submarine traveling home from the Mediterranean has spent much of its journey surfaced. A NATO official said the ...

Key Points and Summary - The 1983 sinking of Soviet nuclear submarine K-429 was less a freak accident than a case study in naval malpractice. -Ordered to sea mid-maintenance with an improvised, partly ...

A Russian submarine was deployed alongside a spy ship to map critical undersea infrastructure around Britain, it has emerged. An anti-submarine Merlin Mk2 helicopter could be seen from the photo ...

During the height of the Cold War, the rivalry between the United States and the Soviet Union spurred several technology-oriented races where both countries were trying to outdo the competition. The ...

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 ...

The sinking of the K-278 led to concerns over environmental contamination, as the submarine went down with its nuclear reactor—and two nuclear-armed torpedoes on board. The K-278’s short service life, ...

A Russian submarine traveling home from the Mediterranean has spent much of its journey surfaced. A NATO official said the activity is unusual. It's not ideal for a submarine to travel this way. The ...

NATO leadership said that a lone Russian attack submarine appears to be "limping home," forced to travel on the surface. An alliance official told Business Insider the activity is "unusual" for a sub ...