Miguel Hidalgo called for Mexican independence from Spain in Dolores on September 16th, sparking the Mexican War of Independence. Though he was later beheaded, the call expanded and the war began. Today this event is commemorated in town squares across Mexico, especially in Mexico City. On September 13th, Mexico lost the Battle of Chapultepec to U.S. forces, though six teenage soldiers defended their flag heroically. Monterrey, Mexico was founded by Diego Montemayor on September 20th and remained a small trading hub until gaining importance as the capital of Nuevo Leon in the 20th century, experiencing steady growth to the present.