Zhang Er (Eighteen Kingdoms)

Zhang Er (Chinese: 張耳; pinyin: Zhāng Ěr; c. 256 BCE – 202 BCE), courtesy name Junjia (君嘉), was a prominent Zhao aristocrat, insurgent leader during the Chu–Han Contention, and the first—and only—King of Changshan (常山王). A lifelong ally of Chen Yu and early supporter of Liu Bang, he helped coordinate anti-Qin uprisings in the final years of the Qin dynasty, governed northern Hebei under Xiang Yu's short-lived Eighteen Kingdoms scheme, and ultimately surrendered his realm to the founding emperor of the Han dynasty.