Haiti during World War I
Following the United States declaration of war on Germany (1917), the Haitian government protested against the heavy German U-boat submarine activity in the area, and officially declared war on July 12, 1918. == United States occupation of Haiti == The United States occupation of Haiti began on July 28, 1915, when 330 US Marines landed at the Haitian capital city of Port-au-Prince, on the authority of United States President Woodrow Wilson.