Military expenditures: Military branches: Military service age and obligation:
3.29% of GDP (2016)
3.3% of GDP (2015)
3.51% of GDP (2014)
3.83% of GDP (2013)
4.24% of GDP (2012)
country comparison to the world: 25
[see also: Military expenditures country ranks ]
United 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)
18 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)
United States Military 2018
SOURCE: 2018 CIA WORLD FACTBOOK AND OTHER SOURCES
