Ma Chao
Cao Cao eventually followed Jia Xu's strategy to turn Ma Chao and his ally Han Sui against each other. Ma Chao fell for the ruse and believed that Han Sui was planning to betray him so he barged into Han Sui's tent and attacked him. Han Sui lost his left arm during the fight and narrowly escaped under the protection of his subordinates. Cao Cao then took advantage of their internal conflict to attack them and defeated Ma Chao. Ma Chao fled to join the warlord Zhang Lu in Hanzhong after his defeat.