Gongsun Kang
In the summer of 202, Yuan Shao died, leaving his territory to his sons. They fought among themselves and fell prey to Cao Cao's advances. By 205 he had ousted Yuan Tan and Yuan Shang from their southern territories. Over the next two years he brought Ji Province and southern Bing Province under his control. In the summer of 207 Cao Cao made a roundabout trip north and defeated the Wuhuan at the Battle of White Wolf Mountain. They fled to Gongsun Kang in Liaodong Commandery, but he beheaded them and delivered their heads to Cao Cao.