Southern Ming
The Southern Ming, also known in historiography as the Later Ming, officially the Great Ming, was an imperial dynasty of China and a series of rump states of the Ming dynasty that came into existence following the Jiashen Incident of 1644. Peasant rebels led by Li Zicheng who founded the short-lived Shun dynasty captured Beijing and the Chongzhen Emperor committed suicide. The Ming general Wu Sangui then opened the gates of the Shanhai Pass in the eastern section of the Great Wall to the Qing banners, in hope of using them to annihilate the Shun forces.