To this day, there has only been one recorded instance of submarine-on-submarine warfare during WWII. The German Navy's destroyed U-864 is toxic to this day.

In an era of hypersonic missiles, stealth fighters, and nuclear subs, it’s hard to picture sailors going toe-to-toe with the enemy on a ship’s deck. Yet during World War II, the crew of a brand-new ...

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.