Since the Cold War thankfully never became a full-scale “hot war,” the GUPPYs ended up never firing any shots in anger.

The wreck of a British submarine used in World War One has been given protection. The submarine, which was deliberately sunk in 1918, was used to boost Britain's defensive power in the war.

The wreck of a World War One German submarine is gradually resurfacing on a beach in northern France after decades of being buried in the sand. Shifting sand off Wissant, near Calais, is exposing ...

"British complaints about the fairness of submarine tactics in WWI. David Hoffman presents captivating documentaries and ...

German sailors deliberately sank their own World War One submarine rather than hand it over to the British, according to a stunning new 3D map. The submarine UC-71 was apparently scuttled off the ...

Twenty years ago, Alice Smith began the hunt for the forgotten Civil War-era submarine Alligator Jr., the prototype for the first United States submarine USS Alligator. Both were designed by ...

STOCKHOLM (Reuters) - A submarine wreck discovered off the eastern coast of Sweden probably dates from World War One rather than last year when the military hunted for a suspected Russian ...

China has invested heavily in its submarines over the past 20 years, but US subs remain superior. But time, location, and numbers could help China mitigate the US's advantages. China also has an ...

By 1917, Germany's 140 U-boats had sunk almost a third of the world's merchant ships. (Source: National WW1 Museum and Memorial, USA.) The SS Maplewood being torpedoed and sunk by German submarine ...