Pancho Villa Expedition
The Pancho Villa Expedition, now known officially in the United States as the Mexican Expedition but originally referred to as the "Punitive Expedition, US Army," was a military operation conducted by the United States Army against the paramilitary forces of Mexican revolutionary Francisco "Pancho" Villa from March 14, 1916, to February 7, 1917, during the Mexican Revolution of 1910–1920. The expedition was launched in retaliation for Villa's attack on the town of Columbus, New Mexico, an incident of the larger Mexican Border War.