This is more a question rather than a stated timeline. Lets say that some how some way, the Fooler (Hilter) is convinced that his insane static and inflexible defense isn't going to work and the entire Eastern front adopts a strategy in the East to simply holding ground and bleeding the Soviets dry with miles and miles of planned defenses, withdraws, anti-tank focuses, concentrated strategic counter attacks, calculated retreats ect. Is it feasible to envision Russian manpower bleeding out in a realistic war time frame or could they have kept on feeding men into the grinder til 1990 if they had too? By 45, the Germans were continually outnumbered in manpower like 12-15 to 1. But if adopted early enough, is there any chance Germany manages to cause real problems to the Soviet fighting strength? Obviously the Germans are still going to be facing insane number of planes, guns, and especially tanks but while the German industry was incapable of matching tank for tank they might have have been able to counter the odds with 5 anti-tank guns for every T-34. Just some thoughts about a ATL with German digging in for the long haul in either November 41, Fall 42, or April 43. I've never seen any numbers concerning soviet manpower reserves in 1945.