Mạc Đăng Dung
In 1527 Mạc Đăng Dung, after defeating and executing the Lê vassal Nguyễn Hoang Du in a civil war emerged as the intermediate victor and established the Mạc dynasty by deposing emperor Lê Cung Hoàng of the once prosperous but rapidly declining later Lê dynasty. Nguyễn Hoang Du's son Nguyễn Kim and his Trịnh lord allies remained loyal to the Lê and attempted to restore the Lê dynasty to power, thereby reigniting the civil war.