France is invaded; I am leaving to take command of my troops, and, with God's help and their valor, I hope soon to drive the enemy beyond the frontier.
The fate of a battle is the result of a moment, of a thought: the hostile forces advance with various combinations, they attack each other and fight for a certain time; the critical moment arrives, a mental flash decides, and the least reserve accomplishes the object.
Read over and over again the campaigns of Alexander, Hannibal, Caesar, Gustavus, Turenne, Eugene and Frederic. ... This is the only way to become a great general and master the secrets of the art of war.