Lê Văn Duyệt
The citadel was not used during the rule of Gia Long and the only military action occurred after his son had ascended the throne as Minh Mạng. Years of tension between the monarch and General Lê Văn Duyệt, the governor of southern Vietnam, came to a head after the death of the latter in 1831. Tension between the pair surfaced when Gia Long made Minh Mạng the heir to the throne. Duyet had opposed the succession, favouring the enthronement of a young son of the late Prince Cảnh, the eldest of Gia Long's sons.