This document summarizes three important celebrations in Mexico: September 13 honors the Niños Heroes, six young cadets who died defending Chapultepec Castle from U.S. invasion. September 16 celebrates Mexico's independence from Spain, which began with Miguel Hidalgo's call to arms in 1810. November 20 commemorates the Mexican Revolution from 1910-1920 when peasants and laborers overthrew the autocratic rule of Porfirio Diaz after 30 years.