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

Military manpower—availability:
males age 15-49: 25,675,266 (1999 est.)

Military manpower—fit for military service:
males age 15-49: 18,675,524 (1999 est.)

Military manpower—reaching military age annually:
males: 1,085,042 (1999 est.)

Military expenditures—dollar figure: $6 billion (1998)

Military expenditures—percent of GDP: 1.3% (1998)