„There were daily quarrels all summer. The point upon which we had our final disagreement was the decision of an offensive on the Caucasus and Stalingrad - a mistake, and Hitler didn't want to see it. I told him the Russians would put in another million men in 1942 and get another million in 1943. Hitler told me that I was an idiot - that the Russians were practically dead already. When I told Hitler about Russian armament potentials, especially for tank materials, Hitler flew into a rage of fury and threatened me with his fists.“
— Franz Halder
To Leon Goldensohn, April 12, 1946, from "The Nuremberg Interviews" by Leon Goldensohn, Robert Gellately - History - 2004.