Li Guang commanded the March without a fixed establishment and rank. He chose a place where water is sweet and grass is fat, and everyone helps themselves. At night, he didn't send patrol soldiers to beat the camp of Diao Dou guards. Military documents are simple and cheap; But reconnaissance posts were also sent from a distance to monitor the enemy, and the barracks were not attacked. If you don't know the process, you will purge the military establishment, pay attention to queues and camps, and knock at night. Military officers and assistants have been busy processing military documents until dawn, and the army can't rest at will; However, there is no danger. Cheng didn't know: "Li Guang's army is very simple and cheap, but if the enemy suddenly attacks, there is no way to resist;" Moreover, Li Guangli's soldiers are also very comfortable and willing to fight for him to the death. Although our army is disturbed by military affairs, the enemy cannot invade us. "But the Huns are more afraid of Li Guang's plan. Most of the Han army soldiers are willing to fight Li Guang, but they are struggling to follow.

Minister Sima Guang said: The Book of Changes said: "As soon as the army comes out, there must be a strict military illusion, otherwise it will be a fierce soldier regardless of victory or defeat." This means that commanding an undisciplined army is not intense. Li Guang led the army and let everyone help themselves. Taking Li Guang's wizards as an example, this is ok, but we can't take his method as a model to follow. Why? It is difficult for anyone who wants to continue to use this method, let alone someone who is a general at the same time as Li Guang! Speaking of the primitive temperament of ordinary people, they all like ease, but they don't know the danger of approaching disaster. Since those soldiers think that Cheng doesn't know how to run the army, is harsh and annoying, and is willing to fight with Li Guang, they will inevitably hate their officers and disobey orders. In this way, the harm of simply commanding the army cheaply is not only that Li Guang's army can't resist the enemy's sudden attack! Therefore, it is only strict to say that "the affairs of the army should always be strict" and to command the army. If so, we can follow suit and don't know how to fight. Even if we can't win the battle, we can still guarantee that we won't fail. If you learn from Li Guang's methods, you can rarely avoid being completely annihilated!