On the day Operation Barbarossa began 3 million men crossed their demarcation line with fully loaded supply trains with direct rail and road links to their supply location and to face an outnumbered, UNlead, and poorly trained opposition. The ONLY thing they had to concern themselves with was the speed and distance of their advance.
Tha main thing was the miscalculation on the part of the Soviet Union for not anticipating or preparing for the Germans to break the non-aggression pact, otherwise much of the Germans' success in the surprise invasion could have been mitigated.
If you truly believe that this is all there is to it you would make a very poor logistician. Having a full 100,000 sq. meter warehouse can supply very little at a time if it only has one loading bay.
Don't put words in my mouth. I never said "that was all there was to it". YOU were the one painting the D-Day landings as something the Allies had to do in haste and miraculously pulled off, when in reality it was the most carefully planned and executed military operation in human history and they had the complete luxury and ability to stockpile the weapons, munitions, and men to carry it out while being behind the English channel.
England was full of supplies. But the allies knew they had to focus on getting those onto French soil and to operating units. And they did it well. The Germans thought the allied reliance on motorized transport would be a liability since horses could forage but trucks need fuel. They did not conceive of Pluto, the fuel supply system the allies set up to pump fuel over the beaches.
If anything the English channel was a godsend to the British and western Allies as they would not have lasted into 1941 without it. By the time the landings were carried out the Kriegsmarine or Luftwaffe were no where to be seen, and the Allies had complete superiority in this regard. When you have complete air and naval superiority, a beach landing is simple a matter of execution.
The Allies were not concerned with the defenses or the actual landings...they only feared the appeared of the 15th Army which was still expect another landing in Pas de Calais. Of course that never happened but the Germans continued believe Normandy was a diversion. Tactical victory which allowed the logistical support to remain intact. Hardly amateur.
There is a US military adage that amateurs talk tactics and professionals talk logistics. The corollary is a rephrasing of the old "tactics win battles but strategy wins wars" to "tactics win battles, logistics win wars."
Well ultimately you need to win battles too, that is what affords the logisticians the opportunity to apply their craft.
Lots of thought goes into logistics in the US military and has ever since the creation of West Point as an academy of not just military training but of engineering and scientific training as well.
No one's denying common sense...