"Hitler had read a lot of military literature. ... In this way, coupled with his personal experience of the last war as an ordinary soldier, he had gained a very good knowledge of the lower level of warfare—the properties of the different weapons; the effect of ground and weather; the mentality and morale of troops. He was particularly good in gauging how the troops felt. ... On the other hand he had no idea of the higher strategical and tactical combinations. He had a good grasp of how a single division moved and fought, but he did not understand how armies operated. ... He had a real flair for strategy and tactics, especially for surprise moves, but he lacked a sufficient foundation of technical knowledge to apply it properly. Moreover, he had a tendency to intoxicate himself with figures and quantities. When one was discussing a problem with him, he would repeatedly pick up the telephone, ask to be put through to some departmental chief, and ask him — ‘How many so and so have we got?’ Then he would turn to the man who was arguing with him, quote the number, and say: ‘There you are’ — as if that settled the problem."