Military branches: Islamic Republic of Iran Regular Forces (Artesh): Ground Forces, Navy, Air Force (Niruye Havayi Jomhuriye Islamiye Iran; includes air defense); Islamic Revolutionary Guard Corps (Sepah-e Pasdaran-e Enqelab-e Eslami, IRGC): Ground Forces, Navy, Air Force, Qods Force (special operations), and Basij Force (Popular Mobilization Army); Law Enforcement Forces (2006)
Military service age and obligation: 18 years of age for compulsory military service; 16 years of age for volunteers; soldiers as young as 9 were recruited extensively during the Iran-Iraq War; conscript service obligation - 18 months (2004)
Manpower available for military service: males age 18-49: 18,319,545 females age 18-49: 17,541,037 (2005 est.)
Manpower fit for military service: males age 18-49: 15,665,725 females age 18-49: 15,005,597 (2005 est.)
Manpower reaching military service age annually: males age 18-49: 862,056 females age 18-49: 808,044 (2005 est.)
Military expenditures - percent of GDP: 3.3% (2003 est.)