흑기군
Millot followed up his victory by mopping up scattered Chinese garrisons left behind by the Guangxi Army after the rout at Bắc Ninh and by mounting a major campaign against Liu Yongfu's Black Flag Army, which had retreated to Hưng Hóa. On 11 April 1884 Millot captured Hưng Hóa and Dong Yan, flanking the Black Flag Army and its Vietnamese allies out of a formidable defensive position without losing a man.