Haiti's legislature is starved of salaries until it ratifies the treaty

The treaty still needed the National Assembly, and the assembly refused. Dartiguenave, short of money for salaries including his own, asked the Americans for funds and was told to ratify first. On 3 October, after he had threatened resignation for the second time, Davis informed him that no revenue whatever would be released, above all no back pay for deputies, senators or ministers, until both houses had voted. The lower house capitulated within seventy two hours, 75 to 6, attaching its own interpretive commentary to the text. Caperton wrote to Admiral Benson that the deputies had followed the president because he had called an extraordinary session worth 600 gold apiece, while the Senate gained nothing and stayed on the fence. Beach was recalled from his dying wife's bedside to lobby them. On 5 November the Senate foreign relations committee reported against the treaty and asked for a new one. On 11 November Caperton went to the palace and told the cabinet the United States would keep control of Haiti with or without a treaty. The Senate ratified that evening, 27 to 6.

On 28 July 1915 a crowd broke into the French embassy in Port-au-Prince, found President Vilbrun Guillaume Sam hiding in a bathroom, dragged him into the street and tore him to pieces. The day before, Sam had ordered the killing of 167 political prisoners taken from elite families, among them the former president Oreste Zamor. Those executions produced the rising that killed him. In Washington, Woodrow Wilson learned of it and feared that Rosalvo Bobo, whom his advisers took for a German sympathiser, would take power. On 29 July he ordered the Marines to occupy Haiti. The stated reason was humanitarian, the restoring of order in a country said to be incapable of governing itself. The working reasons were strategic: keeping Germany out of the Caribbean during the European war, holding the Windward Passage that guards the approach to the Panama Canal, and protecting American money already placed in Haiti. The occupation ran nineteen years. A century of Haitian self government, disorderly as it had been, ended inside a week.

United States marines came ashore at Port-au-Prince on 28 July 1915, hours after a crowd had killed President Vilbrun Guillaume Sam. The last of them left in 1934. Washington gave two reasons, the collapse of order in the capital and the strategic value of the Windward Passage in the second year of the European war. Nobody met the landing party at the waterfront with a rifle. Parts of the capital received the marines with relief. Syrian traders whose shops had been looted in every recent revolution wanted troops in the streets. Members of the mulatto elite, who had just buried relatives killed in the prison yard, feared what Bobo and his Caco army would do if he reached the palace, and preferred American marines to him. That preference was stated in private and almost never in public, because saying it aloud was dangerous. Nineteen years of foreign administration began on an afternoon when the Haitians best placed to object had their own reasons for silence.

Justin Chrysostome Dorsainvil published a study of vodou in the journal Haiti Medicale in 1912 and 1913, the first attempt to treat the possession crisis as a clinical question rather than a moral one. He defined it as a religious and racial psycho neurosis marked by a doubling of the self, with functional alteration of sensibility and of movement, and a predominance of symptoms curable by persuasion. In 1924 he brought out at Port au Prince a philological explanation of vodou which took a different road. There he showed that vodoun is a Dahomean word meaning spirit, that the whole religion of the Fon flows from the cult of the vodoun, and that this cult stands as high as the most spiritualist. He asked at the end whether it was too much to say that such a people had arrived at a clear and precise monotheist conception. The two positions sit badly together, and the twelve years between them measure how fast the ground was moving.