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
Buddhist Uprising Walt for improperly interfering in a domestic matter. During the sporadic fighting that followed, the marines gradually pushed the rebel soldiers towards the east of the Tourane River. By that time, the government soldiers had already retaken the Da Nang City Hall and radio station. The rebel soldiers then seized a bridge across the Tourane River, heavily used by the US military, they mined the bridge and the ammunition dump—which contained 6,000 tons— to prevent government soldiers from crossing to the other side. On May 18 the government soldiers were preparing to cross the bridge and rebel gunners opened fire