南定市
The early arrival of reinforcements from France and New Caledonia and the recruitment of Cochinchinese and Tonkinese auxiliary formations allowed Bouët to hit back at his tormentors. On 19 July "chef de bataillon" Pierre de Badens, the French "commandant supérieur" at Nam Định, attacked and defeated Prince Hoàng Kế Viêm's besieging Vietnamese army, effectively relieving Vietnamese pressure on Nam Định.