6th June 1944–D Day. More than 156,000 British, American, and Canadian soldiers are transported across the English Channel, in the largest seaborne invasion ever attempted. After years of pressure from Stalin, Churchill has finally agreed to open a second front in Europe and send Allied troops to liberate occupied France. From there, they will fight their way across to Germany and–with the Red Army, advancing from the East–finally bring down Hitler’s Fascist Empire. And yet just three months later, the Big Three’s optimism will turn to despair. How did the operation that promised to end the war by Christmas, turn into such a huge failure?