Military branches:
Army, Navy, Air Force, Air Defense Command

Military service age and obligation:
18-30 years of age for male conscript military service; service obligation 12-36 months, followed by a 9-year reserve obligation (2008)

Manpower available for military service:
males age 16-49: 21,247,777
females age 16-49: 20,406,408 (2008 est.)

Manpower fit for military service:
males age 16-49: 18,490,522
females age 16-49: 17,719,905 (2009 est.)

Manpower reaching militarily significant age annually:
male: 831,157
female: 792,330 (2009 est.)

Military expenditures:
3.4% of GDP (2005 est.)