Liu Yongfu
In April 1882 the French naval captain Henri Rivière captured the citadel of Hanoi, again disclosing French colonial ambitions in Tonkin and alarming the Vietnamese and Chinese governments. In April 1883, in the wake of Rivière's capture of Nam Dinh (27 March), the Chinese and Vietnamese were again able to enlist the support of Liu Yongfu and the Black Flag Army against the French in Tonkin.