Trịnh–Nguyễn War
Trịnh Tráng (Hán tự: 鄭梉, 6 August 1577 – 28 May 1657), posthumous name: Nghị Vương (誼王), temple name: Văn Tổ (文祖). He is the second lord of Trịnh ruled Tonkin from 1623 to 1657. He is one of the famous Trịnh lords who ruled Vietnam. He started the Trịnh–Nguyễn War in 1627 and launched several major offensives which failed to crush the Nguyễn lords.