If you really think about, I would argue large military takeovers (multiple countries) are very hard if not impossible at scale (single countries are hard enough). The closest we really have seen is the Nazi blitzkrieg of WWII. Modern monitoring makes huge large scale movements easily traceable. I mean if you get into the beginning of this conflict, they came in and took the supported side of the east and made a quick line to the capital... other than the Ukrainian counterattack... its just meat grinding.
Europe is in trouble and it has nothing to do with Russia, they will be fighting between themselves.... and none of them have much of a military. Nor do they have any ability to create one i.e. cheap energy. This is why mission creep was being used on Russia, in addition to them having tactical nukes.
3 years ago this thread was the Russians couldn't win against the JV, today they're Super Soldiers. Neither one is true.
What the Germans did in WWII is an absolutely amazing feat of engineering and planning that eventually fell apart by scale, that would not be possible today.