 On September 11 cadets of the Academy were involved in fighting on the Condress Estate.On September 13 Chapultepec Castle and its surroundings became the site of the historic Battle of Chapultepec.Its Mexican Army defenders, under the leadership of Nicolás Bravo, former President of the Republic and a veteran of the war of independence, included about 200 members of the Corps of Cadets, aged between 13 and 19.