I found this very interesting since the Polish army is one of NATO’s larger armies. The results are…depressing if anywhere near accurate (and I have no reason to believe that they are not. Poland simulated that their own army would cease to exist after 5 days and that Warzawa would be surrounded in 4 days. In that time, unlikely NATO would even have responded.
Here is the original Polish article sent through Google Translate:
Here are the thoughts of one military/security analyst: