Guan Yu's careless loss of Jingzhou is a well-known phrase, but the main reason for the loss of Jingzhou is the unexpected factor of the rebellion of Mi Fang and Fu Shiren. In fact, Guan Yu's troops left behind in Jingzhou were not many, and they were not careless. In the 24th year of Jian'an (AD) in 219 AD, Guan Yu set out from Nan Commandery to attack Xiangfan in the north, defeating Cao Ren and Yu Ban successively. Especially for the Forbidden War, Guan Yu took the opportunity of the rise of the Han River to flood the Seventh Army, and the entire army was destroyed, and the prisoners alone were captured by 30,000. For a while, Guan Yu was shocked in Huaxia, and Cao Cao almost moved the capital to avoid Guan Yu's attack.
However, Guan Yu was unable to take Fancheng for a long time, and soon Lü Meng crossed the river in white and made a surprise attack on Jingzhou. Guan Yu could only return to the army in a hurry. As a result, because most of the soldiers' families were in Jiangling, the military was unstable, and most of the roads collapsed. Guan Yu was eventually defeated and killed.
The reason why Guan Yu lost Jingzhou is that many people think that he is too careless. However, this is not the case. Before and after the Battle of Chibi, Sun Quan and Liu Bei had a honeymoon period. Sun and Liu's two combined forces first burned Chibi and defeated the main force of Cao Cao's commander, and then joined forces to defeat Cao Ren and capture Nan Commandery. After Zhou Yu's death, Sun Quan also lent Nan Commandery to Liu Bei to relieve his own pressure. Later, Sun Quan married his sister to Liu Bei in order to consolidate the relationship between the two sides. It can be said that during this period, under the military pressure of Cao Cao, the relationship between Sun Liu and Liu was very harmonious.
However, before Guan Yu's Northern Expedition to Xiangfan, the relationship between Sun and Liu alliances was not so good. As early as when Liu Bei led his army into Sichuan, Sun Quan sent people to take Back Lady Sun and tried to take Liu Chan away. It was only because Zhang Fei and Zhao Yun led the army to intercept in time that Liu Chan was taken back.
After Liu Bei captured Yizhou, Sun Quan sent emissaries to Chengdu to claim Jingzhou from Liu Bei. Liu Bei prevaricated the return of Liangzhou after he seized it. Enraged, Sun Quan sent an army to Jingzhou and captured the three counties of Changsha, Guiyang, and Lingling. Liu Bei also personally led the army out of Sichuan and confronted the Wu army in the public security. In the end, it was only because Cao Cao captured Hanzhong that Sun Quan and Liu Bei had to shake hands and make peace, and divided Jingzhou with Xiangshui as the boundary.
It is precisely because sun and liu alliances have cracked, so according to the "Three Kingdoms Chronicle of Lü Meng", Guan Yu left a considerable number of defenders in Gong'an and Nan County during the Northern Expedition to Xiangfan, and set up scouts along the river, in order to prevent Eastern Wu from attacking.
Hou Yu asked Fan, and the remaining soldiers would prepare for the public security and South County.
To this end, Lü Meng suggested to Sun Quan that he be ill and let Lu Xun take over his post in order to paralyze Guan Yu and let him draw troops from Jingzhou to the front line of Xiangfan. However, after Guan Yu received this news, he only transferred a small number of troops from the rear to the front.
Yu Guo shined it, and withdrew his troops slightly to Fan.
This can also be proved by the fact that during the later Battle of Jingzhou, Lu Xun led his army to attack Yidu, Nanxiang, Zigui and other places, and successively destroyed and surrendered tens of thousands.
(Lu Xun) was recruited before and after, where tens of thousands.
Of course, many of these forces are militias that are temporarily mobilized. However, Yidu, Nanxiang, Zigui and other places all had so many troops, and Nan County and Public Security were the core of Liu Bei's rule in Jingzhou, and their garrison strength was naturally more impressive.
Therefore, there were not many troops left by Guan Yu in the rear.
Moreover, guan Yu's main defender who left the town behind would be Nanjun Taishou Lufang. From the perspective of Zhuge Liang, we all know that Mi Fang finally defected. But from the situation at that time, Mi Fang was the only suitable candidate.
Lu Fang was one of Liu Bei's senior generals. When Liu Bei was in Xuzhou, Mi Fang was already following him. Liu Bei was defeated several times, but Mi Fang did not abandon him and married his sister to him. Even when Cao Cao wooed Mi Fang with the high-ranking official Houlu, he did not betray him. It was precisely because Mi Fang had always been so loyal that Liu Bei would appoint him as the Taishou of Nan Commandery.
Moreover, in terms of position, Mi Fang in Jingzhou is the second person after Guan Yu. Obviously, Guan Yu's own northern expedition to Xiangfan and leaving Mi Fang in the rear was the most reasonable choice, and even this could prove the importance he attached to Nan County.
Under normal circumstances, Mi Fang had a lot of troops, and Jiangling was the second largest city in Jingzhou after Xiangyang, with thick walls, and it was difficult for the Wu army to take it in a short period of time, and Guan Yu had enough time to return to the army. Guan Yu's deployment was still appropriate.
As a result, no one expected that Mi Fang would defect, and Fu Shiren also surrendered to the Wu army, and the two most important strongholds of Shu Han in Jingzhou suddenly changed hands, and the situation was out of control.
This sudden situation has exceeded the normal range, and it cannot be said that Guan Yu was careless. If you really want to blame, you can only blame Liu Bei for the people left by Guan Yu for being too unreliable.