Occupation of Veracruz
"By early 1914, Huerta was clearly losing on all fronts, but there was one specific event that precipitated his resignation. When United States sailors were arrested at Veracruz for trespassing on dock facilities, the commander of the United States naval forces off Tampico demanded ceremonial salutes of the United States flag by Mexican personnel. When the United States demands were not met, United States troops occupied Veracruz. Indignation brought about a series of reprisals against United States citizens and their flag throughout Mexico. In the face of growing disorder, Huerta resigned on July 8, 1914."— Country Studies
Mexican Revolution: Occupation of Veracruz
Early 1914 found Mexico in the midst of civil war as rebel forces led by Venustiano Carranza and Pancho Villa battled to overthrow usurper General Victoriano Huerta. Unwilling to recognized Huerta's regime, US President Woodrow Wilson recalled the American ambassador from Mexico City. Not wishing to directly intervene in the fighting, Wilson instructed American warships to concentrate off the ports of Tampico and Veracruz to protect US interests and property. On April 9, 1914, an unarmed whaleboat from the gunboat USS Dolphin landed at Tampico to pick up drummed gasoline from a German merchant.
Coming ashore, the American sailors were detained by Huerta's federalist troops and taken to the military headquarters. The local commander, Colonel Ramon Hinojosa recognized his men's error and had the Americans returned to their boat. The military governor, General Ignacio Zaragoza contacted the American consul and apologized for the incident and asked that his regrets be conveyed to Rear Admiral Henry T. Mayo offshore. Learning of the incident, Mayo demanded an official apology and that the American flag be raised and saluted in the city.