Don’t know ‘bout that.
The Sov, er, Russia is a third world country with a first world (sorta) military.
While they could certainly handle Western Europe’s militaries (sans the US) roughly, I don’t think the Russians could actually AFFORD to conquer Western Europe. It would be a financial catastrophe.
Also, they have to go through an awful lot of other countries just to get to Germany.
They can win in 60 hours according to several think tanks.