It's a story most Americans never knew.
“And there’s a very good reason," said shipwreck diver Richie Kohler. "The United States government didn’t want us to know. They didn’t want us to know how Germany was taking us to task, how successful these U-boats were.”
Nazi propaganda films trumpeted the triumphs of Hitler’s U-boats, submarines that sank thousands of Allied ships — primarily in the North Atlantic.
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