Execution of Joseph Marchand Joseph Marchand (17 August 1803 – 30 November 1835) was a French missionary in Vietnam and a member of the Paris Foreign Missions Society. He is now a Catholic saint, celebrated on 30 November. Personal life Marchand was born in Passavant, in the Doubs department of France. At the age of 25 he joined the Paris Foreign Mission, whose primary goal was (and still is) to evangelize countries in Asia. Vietnam In 1833, he was invited to join the Lê Văn Khôi revolt led by Lê Văn Khôi, son of the late governor of southern Vietnam Lê Văn Duyệt. He vowed to overthrow Emperor Minh Mạng and replace him with My Duong, the son of Minh Mạng's late elder brother Nguyễn Phúc Cảnh, who were both Catholics. Khoi appealed to other Catholics to join in overthrowing Minh Mạng and installing a Catholic emperor. They quickly seized the Citadel of Saigon in an uprising lasting ...