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
Mexican Drug War in tracing Mexican guns which were manufactured in or imported legally to the U.S. In 2008, it was falsely reported that ninety percent of arms either captured in Mexico or interdicted were from the United States. The U.S. Department of Homeland Security and others have dispelled these claims, pointing that the Mexican sample submitted for ATF tracing is the fraction of weapons seized that appear to have been made in the U.S. or imported into the U.S. In 2015, Official reports of the U.S. government and the Bureau of Alcohol, Tobacco, Firearms and explosives (ATF) revealed that over the last