Mexican Revolution: Pancho Villa leads nearly 500 Mexican raiders in an attack against the border town of Columbus, New Mexico.

The Mexican Revolution was an extended sequence of armed regional conflicts in Mexico from 20 November 1910 to 1 December 1920. It has been called "the defining event of modern Mexican history". It saw the destruction of the Federal Army, its replacement by a revolutionary army, and the transformation of Mexican culture and government. The northern Constitutionalist faction prevailed on the battlefield and drafted the present-day Constitution of Mexico, which aimed to create a strong central government. Revolutionary generals held power from 1920 to 1940. The revolutionary conflict was primarily a civil war, but foreign powers, having important economic and strategic interests in Mexico, figured in the outcome of Mexico's power struggles; the U.S. involvement was particularly high. The conflict led to the deaths of around one million people, mostly non-combatants.

Francisco "Pancho" Villa was a Mexican revolutionary. He was a key figure in the Mexican Revolution, which forced out President and dictator Porfirio Díaz and brought Francisco I. Madero to power in 1911. When Madero was ousted by a coup led by General Victoriano Huerta in February 1913, Villa joined the anti-Huerta forces in the Constitutionalist Army led by Venustiano Carranza. After the defeat and exile of Huerta in July 1914, Villa broke with Carranza. Villa dominated the meeting of revolutionary generals that excluded Carranza and helped create a coalition government. Emiliano Zapata and Villa became formal allies in this period. Like Zapata, Villa was strongly in favor of land reform, but did not implement it when he had power.

The Battle of Columbus, also known as the Burning of Columbus or the Columbus Raid, began on March 9, 1916, as a raid conducted by remnants of Pancho Villa's Division of the North on the small United States border town of Columbus, New Mexico, located 3 miles (4.8 km) north of the border with Mexico. The raid escalated into a full-scale battle between Villistas and the United States Army.