Lê Chiêu Thống
Lê Chiêu Thống sent envoy to the Imperial court of the [[Qing dynasty|Qing Empire]] to ask for aid against the Tây Sơn. The [[Qianlong Emperor]] of the Qing Empire under the pretense of restoring Lê dynasty dispatched a large force of 200,000 soldiers, to invade Northern Vietnam, captured the capital Thăng Long.