咸宜帝
In any case, the Cần Vương revolt started on July 5, 1885 when Thuyet launched a surprise attack against the colonial forces after a diplomatic confrontation with the French. Thuyet took Hàm Nghi northwards to the Tan So mountain base near the border with Laos after the attack failed. The campaign was launched when the emperor issued the Can Vuong edict that had been prepared by the regent.