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 from the Mạc royal family fled into the northern mountains while in the province of Cao Bằng and continued to rule there https://travisksydj.vidublog.com/30307499/indicators-on-gk88-you-should-know