Minh Mạng
After Gia Long's death, Minh Mạng and Duyệt clashed frequently. As the southern governor, Duyet had significant autonomy, as only the centre of Vietnam was under direct royal rule. Duyet was a supporter of Catholic missionaries, while Minh Mạng was a staunch Confucianist. Duyet often disobeyed Minh Mạng's orders, and the emperor attempted to reduce the Duyet's autonomous power, which became easier with the general's death in 1831. The governor's post was abolished and the region was put under direct control.