U-570, captured on August 27, 1941, was the only submarine to see active combat service with both the British Royal Navy and the German Kriegsmarine. But U-570 was not the only submarine whose capture served an enemy in the Second World War.
By September of 1944, the Western Allies had broken out of the Normandy beachehead, and suddenly and quickly moved across northern France . By September 7th, the 90th division was stretched across the northern sector on Patton’s Third Army’s left, advancing slowly northeast. As they did so the German defenders made a risky attack in an effort to spoil the allied advance, cutting through Allied lines in a surprise action at the small town of Mairy-Mannville.