A German U-Boat Captain Sank Every Ship He Saw — Then Learned How Fast America Built Them

In the spring of 1943, a German U-boat commander watched a freighter sink into the North Atlantic, confident he was winning the tonnage war. What German U-boat captains didn't realize was that America was replacing those ships faster than they could ever sink them. While Admiral Karl Dönitz calculated his strategy based on traditional shipbuilding, an industrialist named Henry Kaiser completely changed the rules. Using revolutionary welding and prefabrication techniques, American shipyards unleashed the Liberty ship—mass-producing ocean-going cargo vessels in less than five days.

Video Chapters
Midnight Slumber: A U-Boat’s Grim Satisfaction
The Tonnage War: Admiral Dönitz’s Fatal Arithmetic
Henry Kaiser: The Industrialist Who Never Built a Ship
Rivets vs. Welding: The Secret to Industrial Speed
4 Days, 15 Hours: The Impossible Story of the Robert E. Peary
Black May 1943: The Hunters Become the Hunted
Good Enough in Vast Numbers: The Hidden Cost of Speed
Bailing the Ocean with a Bucket: Why Tactics Couldn't Save the Reich
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