In waters believed to be completely safe, a German U-boat appeared without warning. Its presence exposed gaps in Allied ...

The Atlantic was a graveyard where German U-boats stalked Allied convoys, sinking thousands of ships and drowning sailors in ...

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 ...