I know there's been a lot of Case Blue threads in the past, but none recently. So the POD for this one would be WI Hitler stuck to the original plan for Case Blue?
The rapid collase of Russian armies at Kharkov made Hitler over-ambitious, and he insisted that Stalingrad be and the Caucasus oilfields be taken simultaneously.
In the first draft of Case Blue however, it was deemed sufficient to to destroy the industrial capacity of the city and block the passage of the Volga to Russian shipping.
So what if Hitler stickd to this first plan and Army Group B dosnt get dragged into street-fighting where the Red Army can nullify the Heeer’s superiority in open combat this and instead holds the flanks while Army Group A drives into the Caucasus?