In 1919, a new "caco" uprising began, led by Charlemagne Péralte, vowing to 'drive the invaders into the sea and free Haiti.' The Cacos attacked Port-au-Prince in October but were driven back with heavy casualties. Afterwards, a Creole-speaking American "Gendarmerie" officer and two US marines infiltrated Péralte's camp, killing him and photographing his corpse in an attempt to demoralize the rebels. Leadership of the rebellion passed to Benoît Batraville, a Caco chieftain from Artibonite, who also launched an assault on the capital. His death in 1920 marked the end of hostilities. During Senate hearings in 1921, the commandant of the Marine Corps reported that, in the twenty months of active resistance, 2,250 Haitians had been killed. However, in a report to the Secretary of the Navy he reported the death toll as being 3,250. Haitian historians have estimated the true number was much higher; one suggested, "the total number of battle victims and casualties of repression and consequences of the war might have reached, by the end of the pacification period, four or five times that – somewhere in the neighborhood of 15,000 persons."