As soon as the USSR knew it had northern supply routes secured, and southern oil routes, it knew it would win. By absorbing greater casualties.But while the dobbins were coming into their own, the Russians were developing a strategy based on mechanised mobility. Winter, spring, summer and fall.
As for eating them, that strikes me as a tacit admission of defeat before you've even started.
It then called the shots. When the war was done, we could claim the moral victory, the US the economic victory, the USSR the bloody victory, and the French to hoover up the rest.