The civil war between the Lê-Trịnh and Mạc dynasties led to 1592, when the military of Trịnh Tùng conquered Hanoi and executed king Mạc Mậu Hợp. Survivors of the Mạc royal family members fled for the northern mountains while in the province of Cao Bằng and ongoing to rule there https://davidy752krw6.wikiadvocate.com/user