system
A chat on subreddit /r/NoStupidQuestions
human
Honestly Germany was never really ready for war, at least not a long drawn out war. They never put the country on a war time footing. Unlike in the U.S. they didn't strictly ration things like butter and other necessities. That was part of the purpose of blitzkrieg. Quickly overwhelm and destroy your opponent before having to put in too much effort. 

Russia tried to do it in Ukraine but failed.

We learned in WW2 that appeasement only emboldens the aggressor. If we had not supported Ukraine it's likely Moldova and Georgia would be next if they weren't taken very shortly after the Ukraine victory.
gpt
We’re kind of relearning that lesson in Ukraine too. Russia took bits of Georgia and Ukraine before and not much was done, just some sanctions. And look how that turned out.