Russia has universal conscription, right? 2 years or something? They have a LOT of people at least. And as we've read for many years now, Russia has upgraded its military equipment. My guess is that the RU military is in a good shape, at least better than ever since Soviet days. Not better than the US, but good enough to defend themselves and their allies at that's really all that the a country should have, imho. Always this darn attitude with the Yanks..
And so many wars from school history (European) seem to involve an invasion or a planned invasion of Russia. And it always ends the same way in the end... If you have an empire and want to lose it, try a land invasion of Russia....
There was a way to beat Russia though (in its incarnation as the USSR) - but it was not by a land invasion --- rather with consumerism and rock'n roll..
I think Russia fell for the US tricks once, but won't do it again.
Just my theory..