Cao Cao encountered Zhao Yun, and the reason why Zhang Gao and Xu Huang besieged them together was mainly because Cao Cao was worried that one person would not be able to defeat Zhao Yun, thus wasting the time to escape.
It is said that in 208 AD, after Cao Cao pacified the north, he led his army south without stopping, trying to make a decision in one fell swoop. But unfortunately, under the joint efforts of Sun Quan and Liu Bei, coupled with Cao Cao's arrogant enemies, the Wei army was finally defeated in the Battle of Chibi, and Cao Cao could only take the remnants of his army and go to Yiling.
At the same time, Zhuge Liang saw that the southeast wind was rising and everything had been decided, so he quietly left Eastern Wu and returned to Xiakou. Subsequently, Zhuge Liang ordered Zhao Yun to lead three thousand troops to cross the river path to take the Wulin Trail; Zhang Fei led three thousand soldiers to cross the river and ambush at Hulu Valley; and Guan Yu ambushed at Huarong Road.
At five o'clock, Cao Cao and his party came to the Wulin Trail, and then Zhao Yun led people to rush out. Seeing that the leading general was Zhao Yun, Cao Cao was so shocked that he almost fell off his horse, and then immediately asked Zhang Gao and Xu Huang to fight.
Zhang Gao is one of the Four Court Pillars of Hebei, along with Yan Liang, Wen Ugly and others. At the Battle of Guandu, Zhang Gao had fought against Zhang Liao for fifty rounds without winning or losing. However, during the Battle of Rangshan, Zhang Gao was defeated by Zhao Yun's thirty-odd he. It should be known that at that time, the Wei army was in an advantageous position, and Gao Lan, Xiahou Huan, Zhang Gao and others led an army to encircle Liu Bei's army.
However, under such circumstances, Zhao Yun rushed over single-handedly, first engaging Gao Lan in the rear army, raising his hand to beat Gao Lan over and falling off his horse, and then rushing to the front army to defeat Zhang Gao and escort Liu Bei to retreat safely. During the Battle of Changshanpo, Zhao Yun killed seven in and seven out, during which he fought with Zhang Gao for more than ten times, and finally did not dare to fight and leave.
While running, Zhao Yunlian and his horse fell into the pit dug by wei jun, and just as Zhang Gao was preparing to kill him, Zhao Yun jumped out on his horse. As soon as Zhang Hao saw Zhao Yun, he was frightened and directly retreated. It can be seen from this how big Zhang Hao's shadow of Zhao Yun's force is. Moreover, in the Battle of Changshanpo, Zhao Yun cut down two sides of the banner, captured three of them, and slashed more than fifty Wei generals with guns and swords.
Judging from Zhao Yun's two encirclement battles, it can be found that Zhao Yun's force is very strong, and the ability to break through in melee battles is also very strong. Because of this, Cao Cao sighed loudly, "True Tiger Will Also, I should be born to it." Therefore, after Cao Cao saw Zhao Yun's high strength, he thought that Zhang Gao was not Zhao Yun's opponent, and sent Xu Huang, a fierce general, out.
After all, Xu Huang's strength value among the Cao Wei generals was also in the top five, and he had fought against Xu Chu fifty times without winning or losing. In the Battle of Rangshan, Zhao Yun also fought against Xu Chu for thirty times without winning or losing. Therefore, in Cao Cao's view, with the presence of two generals Zhang Gao and Xu Huang, he would certainly be able to drag Zhao Yun.
After all, at that time in the Battle of Chibi, Cao Cao was losing the battle, and the morale of his generals was low. Moreover, Zhao Yun, in accordance with Zhuge Liang's orders, picked up trees and reeds to ambush in the secret place, and waited until Cao Jun was halfway through the Wulin Trail before setting fire to kill them. That is to say, it is possible that Cao Jun was divided into two parts at that time.
The Ulin Trail was close to Chibi, and in addition to Zhao Yun's ambush army, Eastern Wu's army could be killed at any time. Under such circumstances, Cao Cao naturally did not think of fighting against Zhao Yun fairly, but wanted to quickly leave the battlefield and avoid being dragged by Zhao Yun's Shu army, thus causing the end of the total annihilation of the army.
Therefore, after Cao Cao sent Zhang Gao and Xu Huang to fight Against Zhao Yun, he rode away. After Zhao Yun killed the two men, he did not come to pursue, but only grabbed the flag and went back to his life.