In the twelfth year of Jian'an (207), Liu Bei came to Wollongong for the third time and finally saw Zhuge Kongming. Zhuge Liang analyzed the situation today to Liu Bei: "Since Dong Zhuo has come, Hao Jie has risen together, and there are countless people who cross the state and counties..... Jingzhou is north of Han and Chu, li exhausted the South China Sea, east of Wuhui, west of Tumba, Shu, this country of martial arts, and its lord can not defend, this heaven so the general, the general is not interested? Zhuge Liang's meaning was very simple, if Uncle Liu wanted to seize the world, he must first hold Jingzhou in his hands.

Jingzhou is one of the nine prefectures of the Han Dynasty in China, Yugong: "Jing and Hengyang only Jingzhou", roughly equivalent to the whole territory of today's Hunan and Hubei, from the Jingshan area to the Hengshan Mountain. In ancient times, Jingzhou not only had fertile land, a large population and was a very important strategic place in all directions, known as the "hinterland of the Central Plains".
The Chronicle of the Three Kingdoms says that Jingzhou: "According to han and chu in the north, the south china sea in the north, Wuhui in the east, and Tumba and Shu in the west" If the Shu state can occupy Jingzhou, on the one hand, it can unite with Wu to resist Wei, and on the other hand, it can also send troops from Yizhou to attack the Central Plains and unify the world. This shows the importance of Jingzhou to the Shu state.
However, we know that Liu Bei's camp was fought on Chibi by cao cao and eastern Wu soldiers, and Cao Cao's medium-level million-strong army was burned to the ground, and then Zhuge Liang took the opportunity to "borrow" Jingzhou from Cao Cao and Sun Quan. At any time, it may be countered by Cao Cao's camp and Sun Quan's camp, so it is particularly important to let who will guard this strategic place.
One of the most prestigious generals in the Shu Kingdom was naturally Guan Yu, the head of the Five Tiger Generals. Guan Yu was praised by the world in later generations as "Martial Saint" and "Wen Sheng" Confucius. Of course, when Chen Shou wrote the Romance of the Three Kingdoms, he had not yet reached the realm of God. Many of the images are depicted in the Romance of the Three Kingdoms.
However, in the "Romance of the Three Kingdoms", a huge stain was placed on this "martial saint", that is, "carelessly losing Jingzhou". Jingzhou was lost at the hands of Guan Yu, and there was nothing wrong with that. But the question is how it was lost, and that makes a big difference.
So first of all, is Guan Yu really a very proud person in history? It is also false to say that he is not arrogant, he once beheaded Yan Liang, the first fierce general under Yuan Shao, in the Ten Thousand Army in 200 years, and lifted the siege of Baima. And in 219 AD, the flooded City of Fan captured yu Ban Ande and two other famous generals alive. These two battles alone made Guan Yu's name powerful in Huaxia.
Therefore, Guan Yu often did not talk about what others put in his eyes, and in the "Romance of the Three Kingdoms", he effectively recorded the original words that Guan Yu said to his son: "When the yashi attacked, among the thousands of guns and blades, the horses were in a long line, as if entering the realm of no man." Don't worry about the Gangdong group of rats! Of course, this may also be a strategy for Guan Yu to motivate his subordinates.
During the Three Kingdoms period, the water army of Eastern Wu was indeed very strong. Details can be seen in the Battle of Chibi. Although Guan Yu was arrogant, he must not be able to distinguish even the basic enemy feelings. How could he, who was also a witness and participant in the Battle of Chibi, despise Eastern Wu?
When Guan Yu launched a campaign against Xiangfan, he arranged for Mi Fang to guard Jiangling and Fu Shiren to guard public security, ensuring the stability of the rear. Unexpectedly, Lü Meng and Lu Xun, the two governors of Eastern Wu, suddenly "crossed the river in white clothes" and cut off Guan Yu's rear road. Cao Cao continued to send military horses to Jingzhou and the general Fu Shiren surrendered one after another, and at this time Cao Cao also began to continuously send military horses and generals to Jingzhou. The two sides seemed to have already premeditated, so that Guan Yu could not rush to the rescue in time.
At that time, the "Jingzhou Battlefield" almost gathered the most gorgeous lineup at that time, and Guan Yu suffered from the enemy in his belly. In such a situation, even if Sun Wu came, it would be difficult to escape, so it was not so much that Guan Yu was careless, but rather that he was helpless in the trap.