張彥
In 204, Zhang Yan made contact with the warlord Cao Cao, who at the time was warring against Yuan Shao's sons, Yuan Tan and Yuan Shang. Cao Cao appointed him General Who Pacifies the North (). In the summer of 205, after Cao Cao defeated the Yuans, Zhang Yan officially surrendered to the Han imperial court and was enfeoffed as the Marquis of Anguo Village (). He thereafter ruled his territories as vassal to Cao Cao. After his death, his son Zhang Fang succeeded him as marquis; his family maintained their fief during the following decades.