Facing Guan Yu's surrender, Yujin quickly agreed, but Pound refused. At that time, Pound was different from Yu Jin. Yujin has no other relationship with Liu Bei Group except for a colleague who worked with Guan Yu for a while (Guan Yu was dismissed by Cao for a while).
On the other hand, Pound is different. His old superior Ma Teng was killed by Cao Cao, and his new superior Ma Chao served as the left general under Liu Bei. More importantly, he also has a brother named Pang Rou, who works in Hanzhong under the jurisdiction of Liu Bei. It can be said that no matter how you look at it, Pound may surrender to Liu.
Even if Guan Yu was shot in the forehead by Pound in the battle, Guan Yu could still forget the past and treat Pound sensibly, but Pound refused to surrender and died. Why is this?
Pound, a native of Xiliang, worked under Marten in his early years. Later, he paid tribute to the commander of the legion and awarded the title of Lord Hou Ting. After Marten entered the DPRK, he followed Ma Chao.
Pound is brave and good at fighting, often acting as a pioneer, but he is trapped by the enemy. He should be highly valued by Ma and his son. However, after Ma Chao joined Zhang Lu, the two began to part ways. Ma Chao later took refuge in Liu Bei, while Pound took refuge in Cao Cao.
As for why Pound didn't vote for Liu with Ma Chao, the specific reason is unknown. Some people think that when Ma Chao took refuge in Liu Bei, he didn't take him in, but let him stay in Hanzhong. After Zhang Lu surrendered to Cao Cao, Pound surrendered to Cao Cao and worked for him.
Cao Cao is a man who cherishes talents. Seeing that Pound is a rare warrior in the West, I worship him. On the other hand, Ma Chao abandoned him, and Cao Cao gave him extra help. Pound probably appreciated Cao Cao's kindness to meet him. In addition, Cao Cao is the master of the world, so Pound followed Cao Cao wholeheartedly.
When Pound was guarding Fancheng, Cao Wei's generals had doubts about Pound, because his brother Pang Rou had been working in Shuhan (which was not established at this time, and was called Liu Bei Group in this paper). But Cao Cao put him here, which shows his trust in him.
And Pound didn't live up to Cao Cao's trust. Fan Cheng gained the upper hand in the battle and once shot Guan Yu, the commander of Shu Han. After being captured, Guan Yu was loyal to him in the face of his surrender, and even Cao Cao was surprised. It can be seen that Pound was also a man of great righteousness.
Having said that, I have to mention Cao Cao's personal charm. Zhang Liao and Zhang He in the Five Heroes both surrendered to Cao Cao. Both of them were loyal to Cao Wei and made great contributions to Cao Wei, especially Zhang Liao, who was highly valued by Cao Cao.