All the foregoing said, there WON'T be a war over this. Why? Because nobody's going to be foolish enough to take on Bad Mother Russia in their own back yard. This is the other side of Peace through Strength, for most Americans. As for NATO, to the extent it isn't US is also the extent to which it hasn't fired a weapon in anger for three generations now.
Still, the dream of Panzers streaming east is compelling and a bit romantic - but anyone with the yarbles to do it died or was reducated long, long ago.