The civil war concerning the Lê-Trịnh and Mạc dynasties led to 1592, when the military of Trịnh Tùng conquered Hanoi and executed king Mạc Mậu Hợp. Survivors in the Mạc royal family members fled into the northern mountains during the province of Cao Bằng and ongoing to rule there until https://vitnam32197.fitnell.com/71842619/vf555-an-overview