Operation Sealion

n the summer of 1940, the Nazi war machine was at its zenith. France, Denmark, Norway and the Low Countries were all under occupation after a series of lightning military campaigns. Only Britain stood in the way of the complete triumph of Nazi tyranny. But for the first time in the war, Hitler did not prevail. The traditional narrative of 1940 holds that Britain was only saved from German conquest by the pluck of RAF Fighter Command during the Battle of Britain. The image of Dad's Army recruits training with broomsticks is a classic symbol of the nation's supposed desperation in the face of…