In June 1940, German troops massed across the Channel, poised for the invasion of Britain. With France defeated and Britain cowed, Hitler seemed ready for his greatest gamble. As history shows, it was only the valiant efforts of the RAF, and Hitler's own hesitations, that caused Operation Sealion to be scuttled, replaced in favor of the doomed invasion of Russia a year later... But what if Hitler had gone through with his original plan?