This document contains 3 summaries of events in Mexican history: 1) It describes the Battle of Chapultepec in 1847, where 5 teenage military cadets defended the castle against U.S. forces and were killed during the Mexican-American War over territory in California and New Mexico. 2) It discusses Mexico's independence day on September 16th, 1810, when Catholic priest Miguel Hidalgo y Costilla rang the bell of independence and gathered 40,000 Mexicans to fight for independence from Spain, though they lost their first battle. 3) It provides a brief overview of the start of the Mexican Revolution in 1910 due to growing unrest over President Porfirio Diaz having held power