Military branches: Army, Navy (includes Coast Guard and Marine Corps), Air Force
Military manpower - military age: 20 years of age
Military manpower - availability: males age 15-49: 21,220,191 (2001 est.)
Military manpower - fit for military service: males age 15-49: 14,942,363 (2001 est.)
Military manpower - reaching military age annually: males: 848,181 (2001 est.)
