Nguyễn Nhạc
In late 1787, Nguyễn Huệ, no longer served under Nguyễn Nhạc, sent [[Vũ Văn Nhậm]] to invade Bắc Hà under the pretense of punishing Nguyễn Hữu Chỉnh for insubordination. Nhậm captured and executed Chỉnh in January 1788, emperor Chiêu Thống fled to the east of [[Hong River]]. Vũ Văn Nhậm installed [[Lê Duy Cận]] as Country Supervisor (, ) without Huệ's approval. Nguyễn Huệ accused Nhậm of treason and executed him, took over Bắc Hà.