Mexican Revolution revolution was in 1914, during the "Ypiranga" incident. When United States intelligence agents received word that the "Ypiranga", a German merchant ship, contained illegal firepower for Huerta, President Wilson ordered American troops to the port of Veracruz to stop the ship from docking. Wilson never actually declared war on Mexico. The United States skirmished with Huerta's troops in Veracruz. The "Ypiranga" successfully docked at another port and unloaded the arms, which greatly angered Wilson. The ABC Powers arbitrated and U.S. troops left Mexican soil, but the incident added to already tense Mexican-American relations. In 1916, in retaliation for Pancho Villa's
United States occupation of Haiti the war and almost immediately collapsed. The remaining German-Haitians were largely left isolated, with many opting to emigrate (usually back to Germany) or to stay on and try to claw their way back. United States occupation of Haiti The United States occupation of Haiti began on July 28, 1915, when 330 US Marines landed at Port-au-Prince, Haiti, on the authority of US President Woodrow Wilson. The first invasion forces had already disembarked from USS "Montana" on January 27, 1914. The July intervention took place following the murder of dictator President Vilbrun Guillaume Sam by insurgents angered by his political executions