You are wrong about the panzers dude....
The only high-command officer who responded correctly to the crisis at hand was Field Marshal Rundstedt, the old man who was there for window dressing and who was so scorned by Hitler and OKW. Two hours before the seaborne landings began, he ordered the two reserve panzer divisions available for counterattack in Normandy, the 12th SS Panzer and Panzer Lehr, to move immediately toward Caen. He did so on the basis of an intuitive judgment that the airborne landings were on such a large scale that they could not be a mere deception maneuver (as some of his staff argued) and would have to be reinforced from the sea. The only place such landings could come in lower Normandy were on the Calvados and Cotentin coasts. He wanted armor there to meet the attack.
Rundstedt's reasoning was sound, his action decisive, his orders clear. But the panzer divisions were not under his command. They were in OKW reserve. To save precious time, Rundstedt had first ordered them to move out, then requested OKW approval. OKW did not approve. At 0730 Jodi informed Rundstedt that the two divisions could not be committed until Hitler gave the order, and Hitler was still sleeping. Rundstedt had to countermand the move-out order. Hitler slept until noon.
The two panzer divisions spent the morning waiting. There was a heavy overcast; they could have moved out free from serious interference from Allied aircraft. It was 1600 when Hitler at last gave his approval. By then the clouds had broken up and Allied fighters and bombers ranged the skies over Normandy, smashing anything that moved. The panzers had to crawl into roadside woods and wait under cover for darkness before continuing their march to the sound of the guns.
Put that in ur pipe and smoke it....