Battle of Th??X??ng river amongst Tây S?n and Qing Military in December, 1788 In 1771, the Tây S?n revolution broke out in Quy Nhon, which was beneath the control of the Nguy?n lord.[111] The leaders of this revolution have been 3 brothers named Nguy?n Nh?c, Nguy?n L?? and Nguy?n Hu?? no