In September 1885, to undercut support for Hàm Nghi, General de Courcy enthroned the young king's brother Đồng Khánh in his stead. Although many Vietnamese regarded Đồng Khánh as a French puppet king, not all did. One of the most important Vietnamese leaders, Prince Hoàng Kế Viêm, who had been fighting the French for several years in Tonkin, gave his allegiance to Đồng Khánh.[citation needed]