Speaking of Liu Bei's number one famous general, many people's first reaction is Zhao Yun. Because the glory of the First World War of Changshanpo was something that Neither Guan Yu nor Zhang Fei had ever had. However, many of Zhao Yun's achievements are actually the words of novelists, not real history. In history, Shu Han did not have a "five tiger general", and Zhao Yun's status in Shu Han was not high. So, why is Liu Bei unwilling to reuse Zhao Yun? This can actually be seen in two things.

Let's start with the first thing. Zhao Yun and Guan Yu and Zhang Fei had different functions. Guan Yu and Zhang Fei's function was to lead troops to fight in the outside world, which belonged to the nature of "field service", while Zhao Yun's function was "internal service", responsible for Liu Bei's security. In any position, we must pay attention to doing our own work well, and we cannot go to do other business without authorization. Zhao Yun's mistake was that he did not do his job well, and finally made Liu Bei feel that this person could not be reused.
For example, when Cao Cao's army pursued and killed Liu Bei, Liu Bei's major general was outnumbered, but the enemy could not defeat Cao Cao's army, so he had to order Zhang Fei to take the army to break off on the one hand, and on the other hand, let Zhao Yun protect himself and retreat quickly. Zhao Yun was good at making claims at this time, forgetting that his job was to protect Liu Bei, and actually ran to find Ah Dou, which made Liu Bei feel panicked and passive for a while - because of Zhao Yun's unauthorized departure, he fell into a security vacuum.
Mo said that when the Cao army chased after it, it was on the way to retreat that it encountered mountain bandits to rob it, and the consequences were unimaginable. Even after the fact, Liu Bei remembered this scene at the beginning, and he still had palpitations. Let's talk about the second thing. After Liu Bei realized that Zhao Yun was incompetent as a security captain, he felt that it was a pity that Zhao Yun was buried in martial arts, so he held the idea of retreating to the second place and let Zhao Yun be responsible for monitoring Sun Quan's sister, Sun Shangxiang.
At that time, Sun Shangxiang was married to Liu Bei, but had frequent contacts with Sun Quan. In other words, Sun Shangxiang actually played a spy role, and Zhao Yun's job was to counter-espionage. However, Zhao Yun's surveillance of Sun Shangxiang is in a state of ineffectuality, and it can be said that Zhao Yun has dwarfed his counter-espionage function into a guard guard. Zhao Yun was unaware of All that Sun Shangxiang had contacted Sun Quan under his own eyes, and even had Ah Dou wrapped up in Zhao Yun's sight and was ready to take Ah Dou to the State of Wu.
By the time Zhang Fei discovered Sun Shangxiang's plot and informed Zhao Yun, Sun Shangxiang had already taken Ah Dou on a ship to the State of Wu, fortunately, Zhang Fei's news was timely, Zhao Yun snatched Ah Dou from Sun Shangxiang's hands, and if he took a step later, Liu Bei would be very passive. Afterwards, Liu Bei reflected again. He felt that Zhao Yun's martial arts were high, but this kind of personality was really not suitable for appointing him to any job, because of his personality, doing any work would mess things up, and in the end, Liu Bei chose to coldly deal with Zhao Yun, arranged for Zhao Yun to take an idle job, and let him retire in advance.