张献忠
In their later years, the Ming faced a number of famines and floods as well as economic chaos, and rebellions. Li Zicheng rebelled in the 1630s in Shaanxi in the north, while a mutiny led by Zhang Xianzhong broke out in Sichuan in the 1640s. Historians estimated that up to one million people were killed in this self-proclaimed emperor's reign of terror.