After receiving orders from Cao Cao, Huang Xu and Cao Hong immediately set out for the whole army. After the troops arrived in Tongguan, they did follow Cao Cao's orders. Both of them can't hold on, and no matter how much they insult Ma Chao, they can't get out of the city gate. Anyone familiar with the Three Kingdoms should know that Cao Hong himself is a grumpy general. On the 9th day of holding the gate, Cao Hong couldn't swallow this tone, because Ma Chao ordered the soldiers to insult all the people in Cao Shili. Until the first day 10, Cao Hong found that Xiliang had run out of soldiers and horses, and he thought it was the best time to fight back.
So without Huang Xu's consent, he led 3000 soldiers and horses out to fight back. Everyone thought it was Ma Chao's trick. Just out of the city, I saw Ma Dai leading an army to kill, and Ma Chao and Pound attacked from both sides. In the end, Cao Hong lost Tongguan. After the defeat, Cao Hong and Huang Xu also went back to meet Cao Cao and admitted that it was his own responsibility. At that time, Cao Cao was also very angry, and was ready to chop down Cao Hong directly, but because many people interceded for him and Cao Hong was his own brother, he was spared his life at that time.
After losing Tongguan, Cao Cao personally led the troops to conquer Ma Chao. At this time, he happened to meet Xi Liangbing, and the two sides met. In this battle, Ma Chao cut off Cao Cao's beard and robes and killed him. Just as Ma Chao was chasing Cao Cao and preparing to cut Cao Cao with a knife, a general suddenly appeared, and that person was Cao Hong. If there were no Cao Hong, I'm afraid Cao Cao would have been killed by Ma Chao's sword.