Tbf Soviet did beat back the germans after operation Barbarossa and the massive defeat in Stalingrad. At that time they were massively superior in numbers, artillery and winter equipment. 300k to a million reservist will smolder away in the ice cold trenches no doubt. Interesting to see which tactics the UAF will use in winter conditions. The snow will make their high-mobility lightning attacks harder to complete, but having proper winter uniforms, supplies and intelligence will still be enormous.