The civil war in between the Lê-Trịnh and Mạc dynasties led to 1592, when the army of Trịnh Tùng conquered Hanoi and executed king Mạc Mậu Hợp. Survivors of the Mạc royal family fled into the northern mountains from the province of Cao Bằng and continued to rule there until https://eugenen307xdi0.wikifordummies.com/user