The Battle of Yiling is a famous battle in history, this is the first time that Liu Bei claimed to be the emperor to lead the army to fight, but this battle was a failure, after the Battle of Yiling, Shu Han went from prosperity to decline, condensing Liu Bei's efforts for more than 20 years. Not only that, Liu Bei himself was devastated and depressed. Speaking of this battle, it is said that Liu Bei launched it for his second brother, which shows how righteous Liu Bei is, and this ending is really lamentable.

Speaking of Guan Yu, we must start with the fact that he lost Jingzhou, when Liu Bei sent his second brother Guan Yu to guard Jingzhou. Jingzhou was Liu Bei's strategic place at that time, and the people who guarded the town were very important, and Liu Bei of course sent people he trusted very much, so Liu Bei made what he thought was the best choice. Guan Yu is highly skilled in martial arts, heroic and good at fighting, and looks very suitable. At that time, both Liu Bei and Kong Ming instructed Guan Yu to unite with Eastern Wu to fight against Cao Cao, and to attack with troops too hastily. Jingzhou is rich in products and rich in land, and Guan Yu's land in Jingzhou is also somewhat inflated, he is bent on the Northern Expedition, and he can't help but send troops to attack Fancheng without authorization. The Battle of Fancheng was a great victory, and Guan Yu's sharpness shocked the people of the world. At that time, Cao Cao and Sun Quan and others regarded Shu Han as the main enemy.
At this time, Guan Yu was very arrogant and did not pay attention to Sun Quan at all, he repeatedly belittled Sun Quan, saying that Eastern Wu was a rat and the like, and when Sun Quan heard this, he began to fight with Cao Cao against Shu Han. When Guan Yu left Jingzhou to send troops to attack Fancheng, Jingzhou was attacked, and Guan Yu lost Jingzhou in this way, and he also lost his life, which was a pity. After receiving this sad news, Liu Bei made up his mind to avenge his brother and wanted to retake the lost Jingzhou, but the result was not satisfactory.
Later, Liu Bei met With Kong Ming and entrusted him with his posthumous affairs, zhuge Liang said his life's experience and testimonials at this time, and the famous literary "Table of Teachers" came from this. Liu Bei also summoned Zhao Yun and apologized to Zhao Yun because he was not reused. Zhao Yun's qualifications were not bad, but his official position was not high, probably because he and Liu Bei were not as close as Guan Yu, so Liu Bei did not think of sending Zhao Yun to a strategic place like Jingzhou. Zhao Yun never had a great opportunity to show his talents, and Liu Bei was also very guilty about it.
Guan Zhang accompanied Liu Bei through the most difficult period of entrepreneurship and founded the Shu Kingdom together, but in the end Liu Bei also lost Jingzhou and decayed Shu Han because of them, perhaps this is the fixed number of three people.