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 members fled to the northern mountains within the province of Cao Bằng and ongoing to rule there https://vf55509864.goabroadblog.com/30398684/the-basic-principles-of-gk88