So before we start to explain what happen let us understand the scenario of the Europe During 1943. The Germans has captured most of the Europe and are getting punched from the Eastern side by Russians.
Allied leaders Franklin Roosevelt and Winston Churchill knew from the start of the war that a massive invasion of mainland Europe would be critical to relieve pressure from the Soviet army fighting the Nazis in the east.
On June 6, 1944, more than 156,000 American, British and Canadian troops stormed 50 miles of Normandy's fiercely defended beaches in northern France in an operation that proved to be a critical turning point in World War
According to the D-Day Center, the invasion, " combined the forces of 156,115 U.S., British and Canadian troops, 6,939 ships and landing vessels, and 2,395 aircraft and 867 gliders that delivered airborne troops.
The idea behind the ruse was to trick the Nazis into thinking that the invasion would occur at Pas-de-Calais, the closest coastline to UK.The Allies used fake radio transmissions, double agents, and a even Phantom army.
Anticipating an Allied invasion somewhere along the French coast, In 1943, Rommel completed construction of the “Atlantic Wall,” Germany’s 2,400-mile line of bunkers, landmines and beach and water obstacles.
And it was disastrous dress rehearsal 749 U.S. troops lost their lives after a fleet of German E-boats caught wind of the mock invasion.Survivors described the Exercise Tiger fiasco as more terrifying than the D-Day land