[1] In 1773, the Tây Sơn brothers revolted, so Châu Văn Tiếp and his family went into hiding in Hà Duy, remote mountains in Phú Yên province.
In Hà Duy, Tiếp gathered an army of natives and occupied the Tra Lon mountain surrounding the area.
[1] Later, Tiếp led his supporters back to their base in Tra Lon so that they stayed away from the conflict of Lý Tài and Đỗ Thanh Nhơn.
[2] After learning of the fall of Gia Dinh, he led an army whose banner was embroidered with the four words "Lương Sơn Tá Quốc" (lit.
[2][3] Tiếp defeated the Tây Sơn garrison in Saigon and invited Nguyễn Ánh, who had been hiding on Phú Quốc island to return.