What happened:
Lv Meng chose several elite soldiers to pretend to be businessmen, all dressed in white, and went all the way to the west, day and night, and came to the river side of the beacon tower of the Shu army. At that time, the Shu army was careless and let the disguised Wu ship berth for shelter from the wind. The second watch, Wu Jun came out together and captured the defenders, so Wu Jun marched in and quietly arrived in Jingzhou, attacking Jingzhou from the inside. Mi Fang, who was in charge of public security (now Hubei Public Security), and Fu Shiren, who was in charge of Nanjun (now Jiangling, Hubei), all succumbed to the wind.
Guan Yu was frightened when he heard this letter. Then he ordered Yi Kuang to go to Chengdu for help, and called Guan Ping and Liao Hua back to Jingzhou. On the way back to the army, the Shu army lost its fighting spirit and fled countless times. Guan Yu became more and more disgusted and urged the army to hurry. Jiang Qin, the general of the State of Wu, was defeated by Wu Jun, and Guan Yu was chased not far away. Han Dang and Zhou Tai led troops from both sides, while Ding Feng and Xu Sheng led troops from the back to the third night. Guan Ping and Liao Hua led the troops to break through, rescued Guan Yu, and retreated to Maicheng (now southeast of Dangyang County, Hubei Province) with down archers. Wu Jun then surrounded Maicheng.
Guan Yu stayed there for a few days, and Liao Hua and deus ex went to the army for help. Shang Yong Shoujiang Liu Feng and Meng Da refused to send reinforcements, so Liao Hua had to go to Chengdu.
Guan Yu was in Maicheng, with only 300 people left. Without food and grass, reinforcements could not come. Guan Yu had to make Zhou Cang and Wang Fu stick to Maicheng. Take Guan Ping and Zhao Lei to break through. Guan Yu led two generals and 200 disabled soldiers to break through the North Gate. He was captured in Lin Jushan Road, refused to surrender to Wu, and his father and son were killed.
Extended data:
The battle of Jiangling was the first victory after Sun Quan's strategic adjustment. As for Liu Bei, Guan Yu didn't take Monroe seriously, thinking that Huang Kouer was insignificant and defeated lightly. Liu Bei didn't realize the fundamental change of Sun Quan's strategic thought, so all his strategic decisions must be thoughtless. According to the original strategic policy, Guan Yu still regarded attacking Cao on a large scale as the top priority, and did not find that the biggest enemy was actually eyeing up in the rear, which shows that the failure of this war is inevitable.
References:
Baidu encyclopedia-the battle of surprise attack on Jingzhou
Baidu Encyclopedia-Battle of Jiangling