On March 23, '42 Hitler issued a directive ordering the construction of the famed Atlantic wall, which eventually grew to wrap around the entire coastline of France all the way up to Denmark and Norway.
600,000 french workers were designated for the task.
Barracks fortifications, barbed wire, land mines, etc were all part of the original construction which then went through another roud of refurbishment in '44
But...
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What if instead, Hitler orders to the Siegfried Line to go through massive construction overhall with same amount of funds and manpower dedicated to it as OTLs Atlantic wall, wraping around the entire western and eastern borders of the expanded Reich. (A German Maginoit Line 2.0)
How would this Uber-Siegfried Line effect the war?
Would the Allied Sherman tanks be able to pierce this massive land fortification? The Russian T-34?
How would no Atlantic Wall effect the war?