Page "History of Vietnam" Paragraph 38

In 1771, the Tây Sơn revolution broke out in Quy Nhơn, which was under the control of the Nguyễn.

The leaders of this revolution were three brothers named Nguyễn Nhạc, Nguyễn Lữ, and Nguyễn Huệ, not related to the Nguyễn lords.

By 1776, the Tây Sơn had occupied all of the Nguyễn Lord's land and killed almost the entire royal family.

The surviving prince Nguyễn Phúc Ánh ( often called Nguyễn Ánh ) fled to Siam, and obtained military support from the Siamese king.

Nguyễn Ánh came back with 50, 000 Siamese troops to regain power, but was defeated at the Battle of Rạch Gầm – Xoài Mút and almost killed.

Nguyễn Ánh fled Vietnam, but he did not give up.