Khải Định (; chữ Hán: 啓定; born Nguyễn Phúc Bửu Đảo; 8 October 1885 – 6 November 1925) was the 12th emperor of the Nguyễn dynasty in Vietnam, reigning from 1916 to 1925. His name at birth was Prince Nguyễn Phúc Bửu Đảo. He was the son of Emperor Đồng Khánh, but he did not succeed him immediately. Biography Before Emperor Đồng Khánh's era came the eras of Emperor Thành Thái and Emperor Duy Tân, both of whom were exiled by the French for their resistance to the colonial regime. After this trouble, the French decided to enthrone Bửu Đảo as he was the son of the monarch who was the most submissive Nguyễn collaborator with the colonial regime, standing with the French colonizers and opposing any independence movements, Emperor Đồng Khánh. 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. Because of this, Khải Định was very unpopular with the Vietnamese people. The nationalist leader Phan Châu Trinh accused him of selling out his country to the French and living in imperial luxury while the people were exploited by France. Nguyễn Ái Quốc (later known as Hồ Chí Minh) wrote a play about Khải Định called "The Bamboo Dragon" that ridiculed him as being all grand appearance and ceremony but a powerless puppet of the French government. From 1919 onward, the Emperor made a decree that Vietnam cease to use Chinese as official written language and was replaced by Romanized Vietnamese. In 1922, the Emperor's visit to France to see the Marseilles Colonial Exhibition was also ridiculed by nationalist leaders, who hated Vietnam's status as a colonial subject of France and saw nothing in the exhibition worth celebrating. Emperor Khải Định's unpopularity reached its peak in 1923 when he authorized the French to raise taxes on the Vietnamese peasants, part of which was to