Also agree with CV12Hornet (and Finbarr the Fair )View attachment 589352
The axis had control over the whole of Europe, only the Iberian peninsula, Switzerland and Sweden were neutral, and did trade with the Axis, in addition to other neutral countries that did trade with the axis. How, having all this territory, they were unable to extract resources to feed the war machine?
on top of that, the resource and production capabilities of these conquered countries don't just flip over 100% to the Germans because there's a German flag fluttering overhead. Plus occupying territory also takes resources.