啟定帝
Nguyễn Phúc Bửu Đảo became the nominal ruler of Annam on 18 May 1916, after the exile of Duy Tân (Nguyễn Phúc Vĩnh San) and took the name Khải Định for his reign, meaning "auger of peace and stability." He said he wanted to restore the prestige of the empire, but this was not possible with his close collaboration with the French occupiers. Although not satisfied with his position, Khải Định enacted a policy of close collaboration with the French government and was effectively a puppet political figurehead for the French colonial rulers, following all of their instructions to give "legitimacy" to French policies.