"The only thing that ever really frightened me during the war was the U-boat peril," wrote Winston Churchill in his monumental history of World War Two. Churchi

World War II was only a few hours old when the Battle of the Atlantic, the longest campaign of the Second World War and the most complex submarine war in histor

From 1939 until 1942, Hitler's U-boats - his 'grey wolves' - threatened to accomplish what his air force had hitherto been unable to achieve: to starve Britain

In "A Measureless Peril, " the historian Richard Snow captures all the drama of the merciless contest between the quickly built U.S. warships and the ever-more

The German attack on merchant shipping in the Second World War, known as the Battle of the Atlantic, was countered partly by code-breaking intelligence known as