It is often said on the Internet that if the three Heroes fought Lü Bu and Liu Bei did not enter the field to help in the end, perhaps Guan Yu and Zhang Fei could kill Lü Bu. As soon as Liu Bei entered the field, Guan Yu and Zhang Fei instead had to devote their energy to protectIng Liu Bei, and as a result, the three of them circled around Lü Bu's wheels and did not take Lü Bu. Instead, when Lü Bu wanted to leave, he stabbed Liu Bei, let Guan Yu and Zhang Fei go all out to block, and took the opportunity to sneak back to the Tiger Prison Pass.

Liu Bei in the rendition seems to have poor strength, only crying and crying, has no ability, and only has benevolence and righteousness. Is it true that the third of the Lords in history are so bad?
We can see by looking at Liu Bei's achievements.
The Chronicle of the Three Kingdoms records that Liu Bei beheaded Xuzhou at this time. At that time, it was the fourth year of Jian'an, and after Liu Bei and Cao Cao "boiled wine on heroes", they were anxious to find a way to escape. Just at this time, Cao Cao beat Yuan Shu to the last moment, so he assigned Liu Bei to support.
Of course, Cao Cao would not release the tiger from the cage, so he sent his subordinate General Zhu Ling to march with Liu Bei, and ming assisted him, but actually monitored it.
The two men each led their troops to Xuzhou, and Liu Bei thought of taking advantage of the chaos of the war and waiting for an opportunity to escape. Whoever wanted to walk halfway, Yuan Shu had already died of illness. Zhu Ling had nothing to do, so he was anxious to restore Xu Du's life. But Liu Bei didn't want to go back, so he had to go to Xia Pi to repair it.
Zhu Ling thought that there was a car in Xia Pi, and Liu Bei did not have any soldiers and horses, so naturally there was no obstacle, so he got Liu Bei.
Whoever wanted Liu Bei to be able to enter the Pi, without bringing soldiers and horses, asked che to feast and drink, and a knife resulted in che gizzard. After capturing Xia Pi, Liu Bei took advantage of his earlier prestige in Xuzhou to recruit soldiers and horses, and in the blink of an eye there were tens of thousands.
This che was not a nameless junior, but a che riding general and Xuzhou assassin who was personally sealed by Cao Cao. Cao Cao's knowledge of people is only this than Liu Bei, and this car is in a high position, naturally it is not a generalist. Moreover, the history of thorns at that time was no longer a history of thorns that only managed supervision, but a heavy minister who held great military and political power. This can also be seen from che's other official position, the che riding general.
Liu Bei's killing of the car was enough to prove that it was not a straw bag.
If a car is not convincing, then Cai Yang, who was killed by Guan Yu in the middle of the yanyi, may be able to add a few points.
In July of the fifth year of Jian'an, when Cao Cao and Yuan Shao were facing each other fiercely, both sides used their own means to secretly plot against each other's subordinates. Under the situation of Yuan Qiang and Cao's weakness, Liu Pei, the commander of the Yellow Turban Army in Runan, surrendered to Yuan Shao. Runan, near the south of Xu Du, and Cao Cao's heavy army in the north, Yuan Shao quickly ordered Liu Bei to lead the army and Liu Pei to jointly attack Runan, intending to capture Xu Du.
Liu Bei was defending Runan, and there were only a few thousand soldiers. Cao Cao naturally could not let Liu Bei stay in Runan, so he sent Cai Yang to attack. Cai Yang had more soldiers, while Liu Bei had fewer soldiers. Runan is also a small city, and it is not possible to hold on. That's just war! Liu Bei personally led a large army, and with a single blow, went straight into Cai Yang's army and killed Cai Yang.
This Cai Yang was also not a straw bag, but a Runan Taishou that Cao Cao personally ordered, which meant that it was expected that Cai Yang would be enough to defeat Liu Bei, so he took office and sat in Runan.
Liu Bei was the head of the chaos in Zhuo County as early as his youth, which was also similar to his ancestor Liu Bang, and there was naturally no shortage of force at hand. Although Guan Yu and Zhang Fei are big, they also have to obey Liu Bei! Liu Bei has fought countless battles, although he has lost more than he has won, but every time he can easily get out, his skills will naturally not be too bad. If one day Liu Bei, Cao Cao and Sun Quan go head-to-head, it will definitely hit the two of them looking for teeth!