Fritz-Julius Lemp's tragic sinking of the Athenia in a Second U-Boat Flotilla boat opened Germany's U-boat war against England. The following six years of bitter combat found the flotilla at the forefront of distant operations. Leading the attack, Legendary commanders such as Albrecht Achilles, Werner Hartenstein and Reinhard Hardegen littered the Atlantic and Indian Oceans with the twisted steel of sunken ships. Drawn extensively from various war diaries and veterans' personal reminiscences, the Second U-Boat Flotilla describes the tumultuous fortunes of the most successful unit of Karl Donitz's Grey Wolves.