U-869, the submarine profiled in the NOVA program "Hitler's Lost Sub," was just one of the more than 1,100 Unterseeboote, or U-boats, sunk, scuttled, captured, or otherwise lost to German forces ...

Key Point: These strategic weapons turned Cold War submarines into the truly decisive platforms they are today. Submarines during World War II were used mainly for defending friendly coastlines, ...

Here’s What You Need To Remember: But mainly, the Type XXI provides several lessons in how technology—while important—doesn’t alone win wars. It’s also a lesson in how the fanatical pursuit of ...