In September 1914, a single German U-boat ventured into the North Sea. Lieutenant Otto Weddigen’s U-9 slipped past patrols ...

The post-war narrative of the German U-boat efforts follows several stages: the first “Happy Time,” followed by the second “Happy Time,” and then utter destruction by the Allies. In reality, the ...

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 ...

German U-boats once dominated the Atlantic, sinking ships faster than they could be replaced. A small Allied team developed new tactics and training methods that transformed convoy defense, turning ...

In World War I, writes Chicoan and naval historian David Bruhn, “German U-boats sank over 5,200 vessels and came dangerously close to choking off Britain’s critical supply of food in the spring of ...

In the final weeks of the war, the Navy hunted down and sank five German submarines in the North Atlantic. They stopped what they believed was an imminent attack on the East Coast.