Qin dynasty
Note: King Zhaoxiang of Qin (秦昭襄王) had already been ruling Qin for 51 years when Qin annihilated the Zhou dynasty; however the other six warring states were still independent regimes. Some Chinese historiographers thus used the next year (the 52nd year of King Zhaoxiang of Qin) as the official succession from the Zhou dynasty.
Sima Xin
In 209 BC, Chen Sheng and Wu Guang started the Dazexiang Uprising to overthrow the Qin Dynasty. The Qin emperor, Qin Er Shi, placed Zhang Han in command of the imperial army, with Sima Xin and Dong Yi serving as his deputies, to quell the rebels.