Yuan Xi
In 206, Yan Rou accompanied Cao Cao on a campaign against the Wuhuan tribes in You Province and served as his guide. Cao Cao defeated the Wuhuan tribes and the warlords Yuan Shang and Yuan Xi at the Battle of White Wolf Mountain in the following year. After the victory, Yan Rou managed to convince all the Wuhuan leaders in You and Bing provinces to submit to Han rule. The Xianbei chieftains Budugen and Kebineng also sent their sons as hostages to Yan Rou to convince him of their allegiance. When Tian Yin (田銀) started a rebellion in Hejian Commandery (河間郡), Kebineng led 3,000 horsemen to assist Yan Rou in suppressing the revolt.