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 two years. In 1835, he was arrested for supposedly having been associated with the rebellion and later executed in
Huế, becoming a Catholic martyr after having his flesh pulled from his bones by tongs, known as
death by a thousand cuts.
Pope Gregory XVI spoke of Marchand's "courage as a champion of Christ" in 1840, and he was canonized by
Pope John Paul II in 1988. His feast day is 30 November and his joint feast day with the
Vietnamese Martyrs is 24 November. ==See also==