Military branches:
Ministry of Defense: Royal Saudi Land Forces, Royal Saudi Naval Forces (includes Marine Forces and Special Forces), Royal Saudi Air Force (Al-Quwwat al-Jawwiya al-Malakiya as-Sa'udiya), Royal Saudi Air Defense Forces, Royal Saudi Strategic Rocket Forces, Ministry of the National Guard (SANG) (2015)

Military service age and obligation:
17 is the legal minimum age for voluntary military service; no conscription (2012)

Military expenditures:
12.6% of GDP (2015 planned) 10.7% of GDP (2014 planned) 9.4% of GDP (2013) 7.98% of GDP (2012) 7.25% of GDP (2011) 7.98% of GDP (2010)
country comparison to the world: 4
[see also: Military expenditures country ranks ]