"Hitler might have waged his war against the Soviet Union more intelligently. Again, he might have listened to the experts (Halder and Guderian among them), who advised him to concentrate German efforts on capturing Moscow rather than diverting Field Marshal Gerd von Rundstedt's Army Group southwards towards Kiev. In a similar vein, Hitler might not have squandered his 6th Army so profligately at Stalingrad; Alan Brooke's fear was that Paulus might instead conquer the Caucasus, opening the way to the Caspian Sea and Persian Gulf oilfields."