Trịnh Tráng
Shortly after his father's death, Trịnh Tráng launched his final offensive against the Nguyễn. But in a climactic battle, called Truong Duc, the Royal (Trịnh) army was destroyed. At the same time the Lê Emperor (Lê Chan Tông) died, possibly as a result of being at the battle. This defeat was devastating for the Trịnh and the Nguyễn clan's generals planned to further the success and conquer the Imperial Capital.