Trịnh Tùng
In 1570, Trịnh Kiểm died and there was a power struggle between his sons Trịnh Cối and Trịnh Tùng, who fought each other in the war. Simultaneously, the army of Mạc attacked the Lê dynasty from the north and Trịnh Cối was surrendered to the Mạc dynasty. The Emperor Lê Anh Tông supported Trịnh Cối to become the next Trịnh lord and co-operated with him to defeat Trịnh Tùng. Trịnh Tùng found out about this conspiracy, meaning that Emperor Lê Anh Tông with 4 sons had to flee to other places. Later, Trịnh Tùng enthroned Emperor Lê Anh Tông's youngest son, prince Đàm, as the next emperor with title Lê Thế Tông. After that, Trịnh Tùng searched for, captured, and murdered Emperor Lê Anh Tông.