Lê Chiêu Thống
A few months later, realising that his hope of retaining power had gone, the Emperor Lê Chiêu Thống fled north to the Qing Empire of China, where he formally petitioned the Qianlong Emperor for aid. The Qianlong Emperor agreed to restore Lê Chiêu Thống to power, and so in 1788, a large Qing army marched south into Vietnam and captured the capital Thăng Long.