The friendship between the "Three Masters of Taoyuan" was very deep, after Guan Yu was killed, Liu Bei was still able to unite with the forces of Shu Han to unite with the outside world, but why after Zhang Fei was killed, Liu Bei prepared to march east to Sun Wu, Zhao Yun, Zhuge Liang and others did not support it, and even Wei Yan, who was hand-picked by Liu Bei, was silent. In the end, Liu Bei's Northern Expedition brought ma Liang, a not very famous strategist, and the more famous general was only Huang Quan, and as for the first-class strategist and first-class general Liu Bei of the Shu Han Dynasty, he did not bring any of them. This was a great battle concerning the fate of the Shu Han Dynasty, so why did Zhao Yun, Wei Yan, and Zhuge Liang disobey Liu Bei's orders? Why did Liu Bei insist on going his own way?

Death of Guan Yu and Zhang Fei
Although the deaths of Guan Yu and Zhang Fei were all very related to Eastern Wu, they were still different in essence. Guan Yu brazenly launched the "Battle of Xiangfan", which frightened Cao Cao into thinking of moving the capital; Sun Quan, who had always been dissatisfied with Guan Yu, also felt the need to get rid of Guan Yu. Cao and Sun allied, and Guan Yu was eventually killed by Eastern Wu. Guan Yu was killed by Eastern Wu, but Guan Yu's death cao wei and eastern Wu were involved. As the eldest brother, Liu Bei could not avenge his second brother. Guan Yu died for the sake of Shu Han, for Shu Han to be bigger and stronger, and this vendetta must be repaid.
For this reason, Liu Bei also killed his adopted son Liu Feng, and Liu Feng's death was mainly because Zhuge Liang felt that Liu Feng's lord could not control it after Liu Feng was strong, and Liu Bei killed him. However, on the surface, Liu Feng's death was due to the failure to save Guan Yu and Meng Da, causing Meng Da to surrender to Cao Wei. The main reason is that Liu Bei will not tell the group of ministers, so it seems that he is a bit cruel. Then the group of ministers are familiar with the official reasons, which makes Liu Bei's image tall, for the sake of his soldiers, he can kill his adopted sons, which can boost the morale of his soldiers, but also can buy people's hearts. Therefore, at the time of Guan Yu's death in battle, Liu Bei's eastern expedition was unanimously approved by the Shu Han courtiers.
Zhang Fei's status in Shu Han and Guan Yu's status in Shu Han are almost the same, but Zhang Fei's death and Guan Yu's death are very different. Guan Yu died in the battle for the country, and Zhang Fei was killed by his own men. After Guan Yu's death in battle, Cao Cao also died not long after, and Cao Pi proclaimed himself emperor, which made Liu Bei, who was bent on serving the Han Dynasty, bear with it, and immediately shelved his plan to avenge Guan Yu, also planning to be called emperor.
At this time, Zhang Fei, who was in Langzhong, was very worried, because he could not avenge his brother, he borrowed wine all day to dispel his sorrows, and it was difficult to wait until Liu Bei was finished as emperor, and Liu Bei informed Zhang Fei to prepare for the Eastern Crusade. Since it was revenge, it had to be done decently, Zhang Fei ordered his subordinates Fan Jiang and Zhang Da to make white flags and white armor, and when the two heard that the task arranged by Zhang Fei could not be completed at all, the two explained to Zhang Fei, but they angered Zhang Fei, beat the two of them again, and said that if they could not complete the task, they would take their first rank. After the two returned to the tent to discuss, anyway, the horizontal and vertical were dead, it was better to take the risk of taking Zhang Fei's first level, and the two took advantage of the dark night to come to Zhang Fei's tent and take Zhang Fei's first level. Where is the heavens and the earth where they can stay? Eastern Wu, at this time, the relationship between Shu Han and Eastern Wu has frozen.
After hearing that Zhang Fei had been killed, Liu Bei's reaction was not very big. The Chronicle of the Three Kingdoms records: Oh, fly to death! It can be seen that Liu Bei also knows that Zhang Fei's death cannot be blamed on Eastern Wu, and can only be said that death is death, and there is no way to avenge. Since the division is unknown, Liu Bei still has anger in his heart, looking for Fan Jiang, Zhang Da, and Eastern Wu to take revenge. However, such an army was opposed by many ministers of the Shu Han Dynasty.
After Zhang Fei's death, Zhuge Liang, Zhao Yun, and Wei Yan collectively snubbed Liu Bei
Since Zhang Fei's death master was unknown, it was bound to be opposed by the Qunchen. Zhao Yun had openly opposed Liu Bei's Eastern Crusade above the court. The "Biography of Yun Bei" records: Wei should not be ignored, and Wu Zhan should be fought first; once the army is exchanged, it is not allowed to be dissolved.
For Zhao Yun's suggestion, Liu Bei did not adopt it, because he did not avenge his brother, Liu Bei could not get over it, although Zhao Yun was right, but Liu Bei still insisted on going his own way. Although Zhuge Liang did not openly oppose it, Zhuge Liang always adhered to the strategy of "uniting Wu against Cao", and as for Wei Yan, he did not have any attitude, because Wei Yan at this time was also quite important in the town guard Han. Zhao Yun disagreed; Zhuge Liang was unwilling; Wei Yan had a heavy responsibility. In fact, at this time, Liu Bei can reuse people and Ma Chao, Ma Chao is also a strong general in the Three Kingdoms, but Liu Bei is not willing to reuse. The result of Liu Bei's cutting of Wu is known to everyone, so what is liu bei's correct way out?
Northern expedition
Liu Beifa Wu could understand, but it really should not destroy the covenant with Eastern Wu. Looking at the deaths of Guan Yu and Zhang Fei, Liu Bei could point the finger at Cao Wei. Guan Yu's death was also due to Cao Wei, who sent strategists to persuade Sun Quan, presumably Sun Quan would hand over Fan Jiang and Zhang Da. Sun Quan is also a generation of tyrants, and he understands that he cannot break with Shu Han, and Sun Quan still understands the truth of cold lips and teeth.
If Liu Bei's Northern Expedition would be supported by Zhuge Liang, Zhao Yun, and others, then Liu Bei's move could unite the Shu Han, avenge his brothers, and buy people's hearts by the way. It's just a pity that Liu Bei, a generation of tyrants, was not safe in his later years and was defeated by Lu Xun.
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