Gongsun Kang
Cao Cao attacked in the autumn. By the summer of 203 Yuan Shang had been defeated and driven back to Ye, however Cao Cao decided to withdraw at this point. Shang came into open conflict with his brother Yuan Tan, who fled east. In 204 Shang besieged his brother at Pingyuan Commandery but Cao Cao moved against him at Ye and forced him to flee to Zhongshan Commandery where Tan attacked him. Shang fled again to his other brother Yuan Xi in You Province while Cao Cao attacked Tan at Nanpi in Bohai Commandery and killed him. In 205 Shang and Xi were ejected from their territory by mutineers and fled to the Wuhuan under Tadun, but Tadun was defeated by Cao Cao at the Battle of White Wolf Mountain in 207. They fled for the last time, this time to Gongsun Kang, who killed them and sent their heads to Cao Cao.