I've been watching a few documentaries recently and although he seems to have done well in 1939/40, while listening to his Generals, he seems to have blown it in 1941. Pausing the attack on Moscow and diverting south when victory was in his grasp. Pausing at Stalingrad and diverting south for the oil fields, then changing his mind 2 weeks later blowing the whole thing. I'm no expert but even I know you re-enforce success and don't chop and change every five minutes. Any Barbarossa experts in the house able to expand?