The Mexican Army (Ejército Méxicano) serves to protect the country from external aggression, internal unrest, and civil assistance during disasters. It consists of ground forces and air force. Naval forces are separate. There is a conscription component - National Military Service - which is comprised of Mexican citizens committed to 12 months of duty. Military training is minimal for those in this category and they are not integrated with Army branches comprised of career soldiers.
Recruitment of personnel happens from ages 18 through 21 if secondary education was finished, 22 if High school was completed. Recruitment after age 22 is impossible in the regular army; only auxiliary posts are available. As of 2009, starting salary for Mexican army recruits was $6,000 Mexican pesos, or about $500 US dollars per month, with an additional lifetime $10,000 peso monthly pension.
Find out more about joining the National Defense Army.