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United States Military Profile 2018

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Military branchesUnited States Armed Forces: US Army, US Navy (includes Marine Corps), US Air Force, US Coast Guard; note - Coast Guard administered in peacetime by the Department of Homeland Security, but in wartime reports to the Department of the Navy (2017)
Military service age and obligation18 years of age (17 years of age with parental consent) for male and female voluntary service; no conscription; maximum enlistment age 42 (Army), 27 (Air Force), 34 (Navy), 28 (Marines); 8-year service obligation, including 2-5 years active duty (Army), 2 years active (Navy), 4 years active (Air Force, Marines); all military occupations and positions open to women (2016)
Military expenditures3.29% of GDP (2016)
3.3% of GDP (2015)
3.51% of GDP (2014)
3.83% of GDP (2013)
4.24% of GDP (2012)

Source: CIA World Factbook
This page was last updated on January 20, 2018

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