Military branches: National Defense Secretariat (includes Army and Air Force), Navy Secretariat (includes Naval Air and Marines)

Military manpower - military age: 18 years of age
note: starting in 2000, females will be allowed to volunteer for military service

Military manpower - availability:
males age 15-49: 26,171,141 (2000 est.)

Military manpower - fit for military service:
males age 15-49: 19,022,012 (2000 est.)

Military manpower - reaching military age annually:
males: 1,073,809 (2000 est.)

Military expenditures - dollar figure: $4 billion (FY99)

Military expenditures - percent of GDP: 1% (FY99)