After the Battle of Jiangling, Sun Quan was preparing to further seize Yizhou, and he consulted Liu Bei about this, but he was hindered by it, and Zhou Yu, who later advocated the crusade against Yizhou, died of a serious illness, so Sun Quan temporarily abandoned this plan.

【Hindering Sun Quan】

In history, Sun Quan wanted to occupy Jingzhou, but Liu Bei also had this intention, and later Sun Quan sent someone to inform Liu Bei that he intended to join forces to capture Shu, and Liu Bei's subordinate Red suggested that he might as well agree to Sun Quan first, because after all, it was difficult for Eastern Wu to cross Jingzhou to occupy Shu County, so Shu County was naturally owned by Liu Bei.

At that time, Yin Guan, the chief secretary of Jingzhou, also offered a plan: "If you take the lead for Eastern Wu, you may not be able to conquer Shu County, and the defeat will inevitably be swallowed by Eastern Wu by taking the opportunity, and the big thing will be gone." At present, we can only verbally agree to the destruction of Shu, and inform us that we have just occupied the four southern counties, and it is inconvenient to mobilize the army again, and Eastern Wu will not dare to rashly pass through our land to attack Shu alone. This kind of strategy of advancing and retreating can enable us to sit back and take the benefits of Wu and Shu. Liu Bei naturally adopted Yin Guan's opinion, and Sun Quan really gave up his plan to enter Shu. After that, Liu Bei promoted Yin Guan to be a different driver.

According to the record of "Emperor Xian Spring and Autumn", at that time, Sun Quan wanted to attack Shu with Liu Bei, and sent an envoy to Liu Bei to say: "The rice thief Zhang Lu cut off Ba and Han, and he is Cao Cao's eyes and ears, and he is planning to seek Yizhou." Liu Zhang was weak and could not protect himself. If Cao Cao gets Shu, then Jingzhou will be in danger. Now I want to capture Liu Zhang first, march to crusade against Zhang Lu, connect from end to end, and unify Wu and Chu, even if there is a Cao Cao at that time, there is nothing to worry about. ”

And Liu Bei was ready to seek Shu land by himself, so he refused, saying: "The people of Yizhou are rich and strong, the terrain is dangerous, although Liu Zhang is weak, he is enough to defend himself." Zhang Lu is hypocritical and not necessarily completely loyal to Cao Cao. Now that the outstanding division is in Shu and Han, and the battle is thousands of miles away, if you want to defeat and conquer and win, even Wu Qi can't be sure of its plan, and Sun Wu can't do such a thing. Although Cao Cao did not put the Son of Heaven in his eyes, he had the name of the Lord, and now everyone sees Cao Cao's defeat in Chibi, and they all think that he has given in and has no great ambitions. Now that Cao Cao has the second in the world, if you want to drink horses in the sea and watch the troops in Wu Hui, how can you be willing to sit here and wait for old age? Now the alliance is attacking each other for no reason, it will only help Cao Cao and give the enemy a chance, which is not a long-term solution. ”

Sun Quan didn't listen, and sent Sun Yu to lead the naval army to garrison Xiakou. When Liu Bei was passing by the Jiangdong army, he said to Zhou Yu: "If you want to capture Shu, I will wear my hair and return to the mountains and forests, and I will not lose my trust in the world." So Guan Yu was stationed in Jiangling, Zhang Fei was stationed in Zigui, Zhuge Liang occupied Nanjun, and Liu Bei himself was ready to sit in Xiaoling himself. Sun Quan understood what Liu Bei meant, so he summoned Zhou Yu back.

According to the "Biography of Lu Su", previously, because Yizhou Mu Liu Zhanggang often abolished the law and discipline, Zhou Yu and Gan Ning persuaded Sun Quan to capture Shu. Sun Quan asked Liu Bei about this matter, Liu Bei was planning for himself in his heart, and still replied pretending on the surface: "I, Liu Bei and Liu Zhang, are the descendants of the royal family, hoping to save the Han family with the help of the heroic spirits of our ancestors." Now that Liu Zhang has offended everyone, I am alone and afraid to hear the words of attacking Shudi, I hope you will forgive him. If this request is not answered, I will scatter my hair and go to the mountains and forests. ”

However, later Liu Bei went west to plot against Liu Zhang's Yizhou, leaving Guan Yu to guard Jingzhou, and Sun Quan said after knowing it: "Cunning things dare to play tricks." ”

【Rare Yizhou】

After the battle of Jiangling, Zhou Yu said to Sun Quan: "Now Cao Cao is newly broken, Fang is worried in his heart, and he has not been able to deal with the general. Begging and fenwei are both enterprising to Shu, and Zhang Lu is in Shu, because he stays in Fenwei to stick to his place, so as to help Ma Chao. Yu also worked with the general in Xiangyang to crouch, and the north can also be mapped. ”

Zhou Yu's proposal, in fact, was the next strategic policy of Sun Quan's group at that time, among the princes south of the Yangtze River at that time, Sun Quan occupied Jiangdong and Liu Bei, who occupied Jingnan, had formed an alliance, and Jiaozhou was occupied by Sun Quan, only Yizhou was still in the hands of Liu Zhang, and Sun Quan wanted to really confront Cao Cao, as Zhou Yu said, at least Yizhou must be completely controlled south of the Yangtze River. Therefore, Yizhou has naturally become the next strategic target of Sun Quan Group.

Gan Ning, another person who proposed to Sun Quan to crusade against Yizhou, came from Yizhou, and he was also familiar with the situation in Yizhou, and his suggestion also clearly showed that Gan Ning at least believed that Sun Quan's group was capable of conquering Yizhou at that time.

And Yizhou Mu Liu Zhang is indeed inferior in the official history, his father Liu Yan left him a total of three important ministers Zhang Lu, Zhao Wei, Pang Xi, as a result, Zhang Lu was forced by him to rebel in Hanzhong, Zhao Wei failed to rebel and was killed, even if Pang Xi's son and daughter were ready to rebel, but in the end it was not successful, but Pang Xi also did not receive any substantial punishment, in general, Yizhou Liu Zhang's group is indeed not strong in the history of the Three Kingdoms.

In history, the reason why Sun Quan failed to seek Yizhou was mainly because Jiangdong was far away from Yizhou, separated by Jingzhou in the middle, and his ally Liu Bei was in the way, and the general Zhou Yu died young, and Sun Quan finally had to give up.

In terms of distance, there is a Jingzhou between Yangzhou and Yizhou, and the specific point is that if the Jiangdong army extends the river, it will pass through Jiangxia County and Nanjun in Jingzhou, of which Sun Quan of Jiangxia County has already laid a part in the thirteenth year of Jian'an (208), and Nanjun has also been opened when Zhou Yu attacked Jiangling.

But this passage is not very stable, because many of the territories are occupied by Liu Bei, and Liu Bei is still the pastor of Jingzhou, nominally the controller of Jingzhou, Sun Quan wants to crusade against Yizhou safely, and he needs the strong support of his ally Liu Bei, and at that time, Liu Bei has already regarded Yizhou as his own bag after Zhuge Liang proposed "Longzhong Pair", and outsiders are not allowed to touch it at all, as for Sun Quan, although they are allies, there is nothing to discuss in this matter, so Liu Bei's attitude is very clear, just doesn't support Sun Quan to fight Yizhou.

Although Sun Quan did not get Liu Bei's help, but because Zhou Yu and others were determined to fight, Sun Quan still let go, after all, Sun Quan definitely trusted Zhou Yu more than Liu Bei, but there were unforeseen circumstances, Zhou Yu happened to die at this time, and after losing the coach, Sun Quan had to postpone the time of westward expansion for the time being, and finally could only sit back and watch Yizhou for Sun Quan.

Note 1: In history, Jiangling was handed over to Liu Bei before Zhou Yu's death or after his death, and it is difficult to confirm now, in the "Biography of Lu Su", it is recorded that Lu Su controlled his troops after Zhou Yu's death, and was stationed in Jiangling in the early stage, indicating that Jiangling was handed over to Liu Bei after Zhou Yu's death, but in "Offering the Emperor Spring and Autumn", it is also clear that Liu Bei sent troops to let Guan Yu garrison Jiangling in Zhou Yu.