Attack & Sink: the Battle of the Atlantic Summer 1941

‘Attack and Sink’ was the signal that Admiral Donitz sent to the commanders of the 21 U-boats of the Markgraf wolf-pack on the 9th September 1941. Convoy SC42 consisted of sixty three merchant ships, many of them British, many old and dilapidated and all slow and heavy-laden with vital supplies for the United Kingdom, was strung out in 12 columns abreast, covering an area of 25 miles of inhospitable ocean. They set sail from the coast of Nova Scotia at a time when the German U-boats were sink…