The civil war amongst the Lê-Trịnh and Mạc dynasties resulted in 1592, when the military of Trịnh Tùng conquered Hanoi and executed king Mạc Mậu Hợp. Survivors in the Mạc royal family fled towards the northern mountains from the province of Cao Bằng and ongoing to rule there till 1677 https://662343198.qowap.com/90486138/the-definitive-guide-to-gk88