Yizhou (Southwest China)

[1] During the Han dynasty, it included the commanderies Hanzhong, Ba, Guanghan, Shu, Wenshan, Jianwei, Zangke, Yuexi, Yizhou and Yongchang.

[1] At its greatest extent, Yi covered present-day central and eastern Sichuan, Chongqing, southern Shaanxi and parts of Yunnan and Guizhou.

During the First Great Qiang Rebellion (107–118) in Liang Province,[2] unrest also spread to the Hanzhong and Wudu commanderies.

[1] In 188, Liu Yan was appointed governor of Yi Province.

Liu Zhang requested the help of warlord Liu Bei, a relative of his, but the latter turned against Zhang, conquered most of Yi Province, and proclaimed the Kingdom of Shu.