Why was Guan Yu, a generation of God of War, killed by Pan Zhang, a nobody? What is the reason behind it?

Why Guan Yu was killed when he was so powerful;

1. Before the war, Guan Yu was arrogant and careless, and underestimated Wu Dong's military strength.

2. Before and during the war, Guan Yu didn't do detailed and thorough intelligence investigation, which eventually led to being caught between Scylla and Charybdis.

3. There is no unity within Shu. When Guan Yu was defeated and asked Liu Feng and Meng Da for help, Liu Feng and Meng Da did not come to the rescue.

4. Guan Yu's state when he was captured, first of all, was defeated and fled, with few troops. Secondly, getting older is also part of the reason.

Wu Dongbing had a plan, Guan Yu was trapped, fell off his horse and lost the chance to escape.

Extended data:

Guan Yu learned that the Confederate army had fallen and immediately retreated to the south. On the way back to the military adviser, Guan Yu sent messengers to contact Lu Meng many times. Lv Meng always treated Guan Yu's emissary well, allowed various tours in the city, and sympathized with Guan Yu's relatives. Someone personally wrote a trust and asked him to take it away as a proof of peace. When the messenger came back, Guan Yu's men asked him privately about his family, knowing that it was safe and the treatment was better than before. So Guan Yu's soldiers had no intention of fighting again, and the foot soldiers gradually dispersed and retreated to Maicheng.

Guan Yu led dozens of riders to flee, all the way to Linzhou (now Nanzhang County, Xiangfan City, Hubei Province), which is only ten or twenty miles away from Yizhou. Ma Zhong was ambushed and captured by the Ministry of Pan Zhang, and his eldest son Guan Ping was killed in Linzhou. ?

Sun Quan gave Guan Yu's head to Cao Cao, who buried him in Luoyang as a vassal. At the same time, Sun Quan buried Guan Yu's body as a vassal in Dangyang, namely Guanling, also known as Dangyang Mausoleum. Shu Han built a cenotaph for Guan Yu in Chengdu, that is, the tomb of Guan Yu in Chengdu, in order to summon the soul for sacrifice.

References:

Baidu encyclopedia-Guan Yu