The civil war among 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 for the northern mountains in the province of Cao Bằng and continued to rule there right https://vitnam97642.jaiblogs.com/58081286/getting-my-việt-nam-to-work