to Yinping Commandery (陰平郡) and was killed by a Di chieftain, Qiangduan (強端). In 219, Liu Bei emerged victorious in the Hanzhong Campaign and proclaimed
retreated from Hanzhong Commandery while Wu Lan was killed by Qiangduan (強端), a Di chieftain from Yinping Commandery (陰平郡; around present-day Wen County
218 and killed Wu's deputy, Ren Kui (任夔). Wu Lan was slain by Qiangduan (強端), a Di chieftain from Yinping (陰平). Zhang Fei was forced to retreat. Cao Hong
General Cao Wei Han dynasty, Yuan Shao, Yuan Shang Sanguozhi vol. 26. Qiangduan 強端 Yinping (North of Wen County, Gansu) Tribal leader Di Qianwan 千萬 Longyou,