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 on the Mạc royal family members fled to the northern mountains from the province of Cao Bằng and ongoing to rule there https://dukeg084sye9.bloggip.com/profile