Liu Bei came to Jingzhou from 201 AD to join Liu Biao, the mu of Jingzhou, to guard the northern gate of Jingzhou Xinye for Liu Biao, and by the time Liu Bei took the four counties of Jingnan after the Battle of Chibi in 209, Liu Bei had a base for the first time in his life, that is, the southern four counties of Jingzhou--- Wuling County, Lingling County, Changsha County, and Guiyang County.
In Liu Bei's era, the Talents of Shu Han were relatively abundant, mainly because Liu Bei had been fighting in the world for many years and had recruited many talents in various places, such as Guan Yu, Zhang Fei, Zhao Yun, Ma Chao, Huang Zhong, Zhuge Liang and other core figures of the Shu Han Group were not from Yizhou. Zhuge Liang also mentioned in the "Table of Later Departures" that Zhao Yun and others died one after another in a year' time, which were all talents recruited by Liu Bei in various places, not in Yizhou, and it was difficult to replenish, so it would be more difficult to do so without the Northern Expedition.
Liu Bei's era belonged to the end of the Eastern Han Dynasty, when the situation was turbulent and the world was divided, in such a general environment, it was easier to let the wisdom of some strategists and the bravery and good warfare of military generals be reflected. In the Liu Chan era, the pattern of the three divisions of the world at that time was relatively unified, although there were also some capable people at that time. But there may not be a right opportunity for them to make a name for themselves. So on the surface, talent seems empty.
Zhuge Zhan claimed to have received a suicide note from his ancestors and knew the way of using soldiers. That's a big word. Shang Shu ling Huang Chong once persuaded Zhuge Zhan to rush to Fucheng quickly and risk his resistance to Deng Ai. If wei soldiers arrived at Mianzhu, it would be difficult to meet the enemy in the flat land. Zhuge Zhan did not listen and missed the fighter, so that the Wei army gained power, and Deng Ai drove straight in. This matter is also recorded in the Chronicle of the Three Kingdoms, saying that Zhuge Zhan "did not advance in the pan, and Chongzhong repeatedly advised Zhan Zhan to act quickly and take advantage of the danger, so that the enemy could not be brought to the ground." Juju and Wei Na, reverence to the point of drooling. "This side of the bell will also go all the way forward, almost did not encounter very strong resistance. When he came to Yang'an Pass, the guards were the two Sichuan generals Selected by Jiang Wei, Fu Jian and Jiang Shu. As soon as the two men saw that Wei Bing had been killed, Fu Jian consulted with Jiang Shu and went out to meet the enemy himself, and Jiang Shu was guarding the town at Guanshang.