MILITARY OF UNITED STATES| Military branches: | 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 (2009) |
| Military service age and obligation: | 18 years of age (17 years of age with parental consent) for male and female voluntary service; maximum enlistment age 42 (Army), 27 (Air Force), 34 (Navy), 28 (Marines); service obligation 8 years, including 2-5 years active duty (Army), 2 years active (Navy), 4 years active (Air Force, Marines) (2009) |
| Manpower available for military service: | males age 16-49: 72,715,332 females age 16-49: 71,638,785 (2009 est.) |
| Manpower fit for military service: | males age 16-49: 59,764,677 females age 16-49: 59,437,663 (2009 est.) |
