U-boat Assault on America: Why the US was Unprepared for War in the AtlanticSeaforth Publishing, a division of Pen & Sword Books Limited, 2017 - 208 pages The "Second Happy Time" was the informal name given to the phase of the battle of the Atlantic when German U-boats attacked both merchant and U.S. naval vessels along America's east coast. With tankers burning and petrol rationing in New York City, the U.S. Navy seemed powerless to stop the deprivations of Hitler's marauding U-boats.
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