Conventional U-boat submarines had been the backbone of the Kriegsmarine during the early stages of World War 2. Still, as allies developed more prominent and more powerful fleets, the outdated German ...

While the Type XXI subs sank no ships, their potential terrified Allied navies, prompting intensified anti-submarine efforts. Although they lost World War II, the Nazis were more technologically ...

Although they lost World War II, the Nazis were more technologically advanced than their Allied rivals in multiple ways. Berlin’s problem was scale—and trying to do too much with too few resources.