Fa Zheng was originally a subordinate of Liu Zhang, and played an important role under Liu Bei's account. He was regarded as the chief military advisor of the Shu Han Group with his ingenuity, and he was also one of the people who Liu Bei knew him best in his heart. If Fa Zheng was still alive, he would definitely be able to persuade Liu Bei not to attack Wu and avoid the Battle of Yiling. The Battle of Yiling was a fiasco for Shu Han. And if Fa Zheng was present, he would be able to use his wisdom and insight to judge the situation, and perhaps be able to make wiser decisions to avoid Liu Bei's failure. Unfortunately, Fa Zheng unfortunately died, which caused Shu Han to lose an important strategist and the opportunity to unify the world.
Pang Tong is known as the Wolong and Phoenix Chicks and is an important figure in the Shuhan Group. His intelligence and strategy are equally admirable, and he is one of Liu Bei's henchmen. Pang Tong's skill in intrigue and military strategy enabled him to provide valuable advice to Liu Bei. Pang Tong's death undoubtedly caused huge losses to Shu Han, and his death left Liu Bei with no choice but to transfer Zhuge Liang to Yizhou. This caused Liu Bei to lose important influence in Jingzhou, and the strategic layout was forced to change. Pang Tong's death deprived Shu Han of an important supporter, which undoubtedly dealt a huge blow to Liu Bei's plan to unify the world.
Zhang Fei is one of the important members of Liu Bei's group, he is Liu Bei's right-hand man, and he is an indispensable existence for Liu Bei. On the eve of the Battle of Yiling, Zhang Fei was unfortunately assassinated, which deprived Liu Bei of an important general. Before the Battle of Yiling, Zhang Fei was supposed to be the vanguard general of Shu Han, but his death left Liu Bei without enough generals to participate in this decisive battle. The defeat in the Battle of Yiling deprived Liu Bei of the opportunity to strike at Wu, and also had a significant impact on Shu Han's plan to unify the world.
Guan Yu is known as the head of the Five Tiger Generals of Shu Han and is one of Liu Bei's most trusted generals. However, Guan Yu's carelessness and death completely changed the situation in Shu Han and broke Liu Bei's plan. In order to avenge Guan Yu, Liu Bei did not hesitate to launch the Battle of Yiling. The defeat at the Battle of Yiling was a huge setback for Shu Han, depriving Shu Han of the opportunity to continue its march to the Central Plains. And if there is no Guan Yu's death and the changes in Jingzhou, Shu Han can continue to follow Zhuge Liang's Longzhong countermeasures, and it is expected that the Central Plains will be waved and the great cause of unifying the world will be completed as soon as possible.
Liu Bei lost Fa Zheng, Pang Tong, Zhang Fei and Guan Yu, which made him lose the opportunity to unify the world. Fa Zheng's wisdom and insight were able to make wise decisions, Pang Tong's resourcefulness was able to provide valuable advice to Liu Bei, Zhang Fei's bravery made him an important general of Shu Han, and Guan Yu's death had a significant impact on the overall situation of Shu Han. The death and sacrifice of these people not only caused Liu Bei to lose important advisers and generals, but also disrupted the original strategic layout. This put Shu Han's plan to unify the world in a difficult situation and could not move forward. However, the direction of history cannot be changed, and Liu Bei can only accept this reality and continue to work hard to pursue his goal. We can also see the truth of human impermanence, no one can control everything forever, we must cherish every person and opportunity in front of us, and strive to achieve our goals and ideals.