Cao Cao took up five thousand soldiers. In the melee between warlords at the end of the Han Dynasty, he was able to wipe out the heroes and unify the north. First of all, he has foresight and entrepreneurial ambition, and his responsibility is to pacify the world. Therefore, despite repeated setbacks, he never gave up. For example, Mengyang crusaded against Xu Rong, Huaiyang crusaded against Lu Bu, Wancheng crusaded against Zhang Rust, Guandu fought against Yuan Shao, and Chibi met Zhou Yu. Cao Cao is always fearless in times of crisis, even just survived, but his fierce ambition remains the same, so he always regroups and makes a comeback, defeating the strong with the weak. While other warlords, like Zhang Miao, just want to be independent, or try to be brave for a while, like Lu Bu, or dream of being an emperor, like Yuan Shu, or suffer from boredom after defeat, like Yuan Shao, or wait and see, like Liu Biao, all their military forces surpassed Cao Cao, but in the end they were swallowed up by Cao Cao.