After Sun Quan captured Jingzhou, Yong'an, which connected Yizhou and Jingzhou, became the gateway to the west of Shu Han. When the Battle of Yiling was defeated, Liu Bei personally stayed in Yong'an to prevent the Wu army from taking advantage of the situation. After Liu Bei's death, Li Yan, Chen Zhi, Zong Qian, and others successively guarded Yong'an.
In the early days, due to the tense relations between Shu and Wu, there were many Shu troops deployed in Yong'an. Later, as the relations between Shu and Wu improved day by day, Zhuge Liang began the Northern Expedition again, and most of the elite of the Shu army was deployed in Hanzhong, which was close to the State of Wei, and the number of Shu troops in Yong'an gradually decreased.
When Zhuge Liang died, Eastern Wu was worried that the Wei state would take advantage of the opportunity to cut down Shu, so it sent an additional 10,000 troops to Baqiu, first to rescue Shu Han, and second, to profit from Shu Han when it was difficult to support, so Shu Han also added troops to Yong'an. However, after that, the State of Wei did not send troops, and Zong Pre sent Jiangdong to re-ease the relations between the two countries, so Shu Wu quickly withdrew the increased troops.
and Liang Pawn, Wu Shu wei or Chengyi shu, Zengbaqiu garrison ten thousand people... Shu hears of it, and it is also beneficial to the keeping of eternal peace
Later, although Sun Xiu joined forces with Zhang Bu, Ding Feng, and others to get rid of Sun Qi, the situation in Eastern Wu calmed down, but according to relevant historical records, Yan Yu's Shu army remained in Yong'an, until the State of Wei launched a war to destroy Shu, Liu Chan ordered Yan Yu to immediately lead an army back to help. He left his deputy Luo Xian with two thousand men to stay behind, and he led his army back.
Wei Zhi cut shu, summoned Yu Xi huan, and xian shou Yong'an City
Yong'an originally had a certain number of defenders, plus Yan Yu's five thousand men and horses, which should be around 10,000 people. Deducting the two thousand men and horses left to Luo Xian, Yan Yu should also have several thousand people under him. The Shu Han Dynasty had no more than 100,000 troops, so Yan Yu's Yong'an Army was also a considerable force, but the whereabouts of Yan Yu and his commander's army were never mentioned in the history books after that.
Yan Yu stills
Let's analyze according to the historical data, where Yan Yu may end up.
According to the Chronicle of the Three Kingdoms, Jiang Wei learned that Zhong would rectify the army and horses, and after intending to cut down Shu, he warned Liu Chan. However, Liu Chan favored Huang Hao, and Huang Hao believed in the words of the ghost witch, believing that the Wei army would not really attack, so it was a precaution and did not prepare for war.
It was not until Zhong Hui launched an attack on Hanzhong that Liu Chan ordered his right car to ride Liao Hua, his left car to ride Zhang Yi, and the auxiliary general Dong Jie to lead an army to Hanzhong to defend against the Wei army, and Yan Yu should have received orders to return at this time.
Although Hanzhong had already been captured by Zhong Hui before Zhang Yi and the others arrived. But then Jiang Wei successfully returned to the Defensive Sword Pavilion and blocked the Wei army's offensive. And Deng Ai spent a lot of time on the Yinping Path, so Yan Yu still had enough time to rush back to Chengdu, and he may go to three places after that:
The first is the Sword Pavilion.
Since the main forces of the wei and Shu armies were concentrated in the Sword Pavilion at this time, many people believed that the outcome of this battle would determine the final fate of shu Han. Therefore, it is possible that Liu Chan ordered Yan Yu to also lead an army to the Sword Pavilion to reinforce Jiang Wei.
The second is Brazil.
After the Wei army captured Hanzhong, in addition to attacking the Sword Pavilion, it could also take the Micang Road to capture Brazil, and then turn to Fucheng, thus bypassing the Sword Pavilion. When Cao Cao had just captured Hanzhong, Zhang Gao once took the Micang Road to attack Brazil, but he was defeated by Zhang Fei. Therefore, Liu Chan may also let Yan Yu garrison Brazil in order to prevent the Wei army from repeating the same trick.
The third was to stay in Chengdu and finally fight Deng Ai with Zhuge Zhan.
Because Liu Chan was too optimistic about the situation, he did not mobilize when the Wei army attacked, nor did he dispatch the southern central garrison to the north. In this way, under the circumstance that Liao Hua and others had already been sent out to reinforce Jiang Wei, the number of troops that could be used for maneuvering within shu Han was already very limited, and most of them were likely to hold the place for a long time, had no actual combat experience, and had limited combat effectiveness.
In contrast, although Yan Yu's Yong'an Army did not have experience in large-scale wars, it was also a border defender after all, and its training and other aspects were more stringent. In the case of internal emptiness in Yizhou, Liu Chan was likely to leave Yan Yu by his side and use it as a final reserve. In this way, after Deng Ai smuggled yinping, Yan Yu's Yong'an corps should go with Zhuge Zhan to meet the Shu army, and was eventually defeated by the Wei army.
Judging from the later battle of Mianzhu, Zhuge Zhan once repelled the Wei army, the third of these three possibilities is the most likely. After all, without the help of the Yong'an Corps, it seemed difficult to repel The elite Wei army carefully selected by Deng Ai with only the garrisons in Chengdu who had not been on the battlefield, with a considerable or possibly slightly small number of troops.
Of course, from the "Romance of the Three Kingdoms" about the Battle of Mianzhu, when mentioning the name of the martyred general of the Shu army, there is no mention of Yan Yuguan, even if he participated in this battle, he should not have died in battle, and finally surrendered with Liu Chan.
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