People have focused too much on the total amount of Russian forces that can be brought into the fight.  Ukraine doesn't have to defeat 190,000 Russians, it only has to significant degrade the first line forces in the initial attack.  If it can do that, the Russian attack will ultimately fail.  Let me break that down a bit. From my vantage point the first wave, roughly 1/3rd of the total ground force, was supposed to knock out most of the organized Ukrainian resistance.  The second 1/3rd was