Sink the Bismarck!

The story starts with a clip of actual German newsreel footage from 14 February 1939, when Nazi Germany's largest and most powerful battleship, Bismarck, is launched in a ceremony at Hamburg with Adolf Hitler in attendance. Two years later, in 1941, British convoys are being ravaged by U-boats and surface raider attacks that cut off supplies essential for Britain's abilities to continue the war. In May, British intelligence discovers the Bismrck and the heavy cruiser Prinz Eugen are about to break out of the Baltic and into the North Atlantic to attack convoys. A spy in Norway spots