Germany's World War II U-Boat fleet represented the elite of their naval personnel. In terms of technology, training, tactics and combat successes, the U-Boat Waffe was far superior to that of any other combatant nation. In this comprehensive book, the wartime development of the U-Boat is traced along with the experiences of typical U-Boat crewmen, from recruitment to combat. The author examines the operational tactics of the U-Boat fleet, as well as describing the massive bunkers that housed them.