阮岳
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 himself Emperor in 1778. A conflict with the Trịnh thus became unavoidable.