Afterward, Leclerc was replaced by Donatien-Marie-Joseph de Vimeur, Vicomte de Rochambeau. Rochambeau wrote to Napoleon that, to reclaim Saint-Domingue, France must 'declare the negroes slaves, and destroy at least 30,000 negroes and negresses.' In his desperation, he turned to increasingly wanton acts of brutality; the French burned alive, hanged, drowned, and tortured black prisoners, reviving such practices as burying blacks in piles of insects and boiling them in cauldrons of molasses. One night, at Port-Républican, he held a ball to which he invited the most prominent mulatto ladies and, at midnight, announced the death of their husbands. However, each act of brutality was repaid by the Haitian rebels. After one battle, Rochambeau buried 500 prisoners alive; Dessalines responded by hanging 500 French prisoners. Rochambeau's brutal tactics helped unite black, mulatto, and mestizo soldiers against the French.