What was the maximum theoretical manpower the Soviets could have mobilized. If the war was hypothetically worse than OTL, or they ended up mobilizing well before Barbarossa, what is their max manpower, say in terms of 1939-1941? That they might have drawn from.
These are 'military age males', though, not every male. Those avaialbe for service more to the point 1939 - 1941. I relaize the population changed between those years but any clear answer will do for our purposes. It doesnt have to be restricted to 1941.