king of Siam Taksin launched a war to regain control of Cambodia. The war went against the Nguyễn lords and they were forced to abandon some of the newly conquered lands, which included the Principality of Hà Tiên in the eastern coast of Cochinchina. Lord Nguyễn Phúc Khoát died in 1765, the court power was transferred to the unpopular regent Trương Phúc Loan, creating a political crisis. This coupled with heavy taxes and endemic corruption at the local level, spurred three brothers Nguyễn Nhạc, Nguyễn Huệ, and Nguyễn Lữ (not related to the Nguyễn lords) from the village of Tây Sơn, central Vietnam, to begin a revolt in 1771 against the Nguyễn lord Phúc Thuần. The Tây Sơn brothers styled themselves as champions of the people. Over the next year, the revolt gained traction and they won some battles against the Nguyễn army that was sent to crush their rebellion. The Tây Sơn drew their support from not only poor farmers but also by some indigenous highland tribes. Nguyễn Huệ, the brothers' leader, said that his goal was to end the people's oppression, reunite the country, and restore the power of the Lê emperor in Hanoi. The Tây Sơn also promised to remove corrupt officials and redistribute land. In 1773 the Tây Sơn captured the port of Qui Nhơn, where the merchants, who had suffered under restrictive laws put in place by the Nguyễn, lent the uprising their financial support. The Nguyễn, at last recognizing the serious scale of the revolt, made peace with the Siamese, giving up some land they had conquered in previous decades. However, their problems were compounded when Trịnh Sâm chose to end the 100-year peace and exploit the turmoil in the south by sending his army to attack Phú Xuân (modern-day Huế), the Nguyễn capital. The Trịnh army captured the city, forcing the Nguyễn to flee to Gia Định (now modern day Saigon) The Trịnh army continued to march south and the Tây Sơn army continued its conquest of other southern cities. The forces arraigned against the Nguyễn were simply too many and in 1776 the Tây Sơn army captured the last Nguyễn stronghold of Gia Định and massacred the town's Chinese population. The entire Nguyễn family was killed at the end of the siege, except for one nephew, Nguyễn Ánh, who managed to escape to Siam. The eldest Tây Sơn brother, Nguyễn Nhạc, proclaimed