Here is the first blow-by-blow account of the undeclared German-American Naval War of 1939-1941: the dramatic story of naval blockades and encounters between German U-boats and American destroyers...and the burning personal hatred between Hitler and Roosevelt that lay behind these clashes. "Hitler vs. Roosevelt" traces the deterioration of German-American relations from as early as 1933, when both leaders assumed power, and provides a revealing account of the implacable hostility that festered between these two strong personalities. Authors Bailey and Ryan have combed documents recently declassified by the British government, as well as previously unused material from the Roosevelt Library at Hyde Park. They have also consulted the logs of the German U-boats and the testimony of American naval officers who took part in this lethal game of hunter versus hunted in the strategic waters of the North Atlantic, where German submarines torpedoed American destroyers and supply ships, and U.S. vessels returned the fire - with neither side really wanting a formally declared war. Together, Bailey and Ryan have written the compelling story of the many ramifications of this historic clash between these two dominant world leaders.