劉永福
The arrival of Admiral Amédée Courbet in Ha Long Bay in July 1883 with substantial naval reinforcements further strengthened the French position in Tonkin. Although the French were now in a position to consider taking the offensive against Liu Yongfu, they realised that military action against the Black Flag Army had to be accompanied by a political settlement with the Vietnamese court at Huế, if necessary by coercion, that recognised a French protectorate in Tonkin.