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
1st Marine Regiment (United States) a combat force in the so-called Banana Wars, in the Caribbean area. The first of these engagements occurred in April 1914, when the regiment landed and seized the Mexican port of Vera Cruz. They next participated in the Haitian campaign (1915–1916) and the Dominican Republic campaign (1916). On 1 July 1916, this organization was re-designated as the 1st Regiment of Marines. In December 1918, the 1st Regiment returned to the Caribbean and was deployed to Cuba for approximately six months. Following its second Dominican tour of duty, it was deactivated; but it was subsequently reactivated at Quantico, Virginia on 15