United States involvement in the Mexican Revolution with its diplomatic and economic rivals in Mexico, particularly Great Britain and Germany, meant that foreign powers affected the way the Mexican situation played out. When U.S. agents discovered that the German merchant ship, the "Ypiranga", was carrying arms to Huerta's regime, President Wilson ordered troops to the port of Veracruz to stop the ship from docking. The U.S. did not declare war on Mexico city but the U.S. troops carried out a skirmish against Huerta's forces in Veracruz. The "Ypiranga" managed to dock at another port, which infuriated Wilson. On April 9, 1914, Mexican officials in the port of
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