Trịnh Tùng
Trịnh Tùng was the second son of Trịnh Kiểm. In 1572, upon the death of his father, Trịnh Tùng's elder brother, Trịnh Cối, took command. Immediately challenged by Trịnh Tùng, Trịnh Cối lost a battle to the Mạc, and thus Trịnh Tùng took control of the situation. He proved to be a very capable leader and in 1571, the Lê Loyalist Army captured the Eastern capital Hanoi from emperor Mạc Mậu Hợp. However, a counteroffensive the next year drove them out. In the midst of this reversal, the nominal Lê emperor, Lê Anh Tông, fled to Nghệ An Province. Trịnh Tùng appointed a new emperor (Lê Thế Tông), and had the previous king assassinated. The war against the Mạc continued for the next twenty years until 1592, when the Eastern Capital(Dong kinh) was reconquered. Mạc Mậu Hợp was captured during the retreat and subsequently executed.