Liu Bei launched a war against Wu for an important reason, to avenge Guan Yu, but before he went out on the expedition, his brother Zhang Fei was killed by his subordinates. Fan Jiang and Zhang Da, who killed Zhang Fei, took Zhang Fei's head and turned to Eastern Wu, which for Liu Bei was an old hatred and a new hatred, which increased his anger even more.
However, although Liu Bei used the strength of the whole country, it ended with Liu Bei's fiasco. So, Fan Jiang and Zhang Da, who defected to Eastern Wu, what was their end?
First, Liu Beifa Wu cause
After Liu Bei captured Hanzhong, his strength increased greatly, and he wanted to rest for a while to continue to advance north and seize the northern region, and in this context, Guan Yu hastily launched the Battle of Xiangfan. Sooner or later, this war would have to be fought, but Guan Yu fought too early, which disrupted the strategic deployment of Shu Han. After Guan Yu launched the Battle of Fancheng, although he began to win victories one after another, which shocked Cao Wei, from another point of view, Guan Yu's war was a failure.
Fan Cheng was never lost under Cao Ren's death, and Guan Yu also suffered heavy casualties due to continuous combat, on the one hand, for the needs of the war, he constantly transferred Jingzhou soldiers and horses to the front line to fight, resulting in the emptiness of Jingzhou, on the other hand, the soldiers continued to fight, showing fatigue and war weariness. In this case, Guan Yu also disregarded the overall situation of Shu Han and humiliated Sun Quan, so that Sun Quan firmly attacked Jingzhou, and eventually Jingzhou was easily taken by Lü Meng. After the fall of Jingzhou, Guan Yu's army was distraught and was defeated by the Cao Wei general Xu Huang. At the same time, the soldiers also left him. Guan Yu defeated Maicheng with only a few dozen horses, and was eventually captured and killed by Eastern Wu.
This made Liu Bei angry, Liu Bei declared himself empress, and his brother Zhang Fei led two large armies to lead the army to attack Wu.
Second, the reason why Zhang Fei was killed
Although Zhang Fei has his kind and bold side, and the people he admires are even more respectful, but he has a rough attitude towards his subordinates, often beating them, especially after Guan Yu's death, Zhang Fei is in a worse mood, often drinking, after drinking alcohol, he scolds his subordinates, and finally the generals Fan Jiang and Zhang Da can't bear it, and when Zhang Fei is asleep, he kills them.
Fan Jiang and Zhang Da, after cutting off Zhang Fei's head, took Zhang Fei's head and turned to Eastern Wu, which for Liu Bei was an old vendetta that had not been repaid, and a new hatred had been added. He led his troops to attack Eastern Wu with all his might, but Eastern Wu, under the leadership of the young marshal Lu Xun, adopted a defensive strategy and brought the war to a stalemate by holding out. Due to topographical limitations and Liu Bei's negligence, the Shu army swept up the village by mountains and rivers, resulting in the entire military camp being 70 kilometers long.
Liu Bei'an camp violated the taboo of the soldiers, was caught by Lu Xun, burned the camp, and defeated Liu Bei. After Liu Bei's crushing defeat, he retreated to the White Emperor City. In order to counter Cao Cao's needs, Sun Quan once again sent envoys to reconcile with Liu Bei and rebuild Sun Liu's alliance. Although Liu Bei was ashamed and distressed by the defeat of the army, for the sake of Shu Han, he still agreed to re-ally with Eastern Wu.
Third, Fan Jiang and Zhang Da's ending
After Fan Jiang and Zhang Da killed Zhang Fei, they took Zhang Fei's head and defected to Sun Quan, but the little people were doomed to not be valued by the magnates, and although they killed Zhang Fei and eliminated a fierce enemy for Eastern Wu, they took them in, which was harmful to Eastern Wu. For the sake of his own interests and in order to quell Sun Liu's war, Sun Quan took the initiative to hand over Fan Jiang and Zhang Da to Liu Bei. These two people were also killed by Zhang Fei's son Zhang Baowan to pay tribute to Zhang Fei's spirit.
Sun Quan seized Jingzhou in order to strengthen his own strength and prepare for the conquest of the world, but due to the existence of Cao Wei, he did not want to see a war break out between Sun Liu's two families, and his lips were cold, and it was difficult to oppose Cao Wei with the strength of any of Sun Liu's families. Therefore, he did not hesitate to give up the lives of two minor people in exchange for Sun Liu's truce, but Liu Bei attacked Eastern Wu, not just for revenge. Although Sun Quan returned Fan Jiang and Zhang Da, the war between Sun and Liu still broke out, and on the surface, Eastern Wu won the war, but in fact both families lost, which also affected the final outcome of the Three Kingdoms.