1) The document discusses three important dates in Mexican history: September 13th commemorates the Battle of Chapultepec Castle during the Mexican-American War where young Mexican cadets fought against invading American forces. September 16th marks Mexican Independence Day, which originated from Miguel Hidalgo's call to arms in 1810. November 20th is the anniversary of the start of the Mexican Revolution in 1910 led by Francisco Madero against dictator Porfirio Diaz.