Chen Gong
The following year, Cao Cao attacked Tao Qian again, conquering many counties in Langya and Donghai commanderies of Xu Province. Just then, Cao Cao's subordinates Zhang Miao and Chen Gong rebelled against him and aided Lü Bu in taking over his home base of Yan Province. Cao Cao then decided to abandon his campaign on Tao Qian and turn back to retake Yan Province.