| Military branches: | Army, Navy and Marine Corps, Air Force, and Coast Guard (Coast Guard administered in peacetime by the Department of Homeland Security but in wartime reports to the Department of the Navy) | 
			
			
			| Military manpower - military age: | 18 years of age (2003 est.) | 
			
			
			| Military manpower - availability: | males age 15-49: 73,597,731 (2003 est.) | 
			
			
			| Military manpower - fit for military service: | NA | 
			
			
			| Military manpower - reaching military age annually: | males: 2,116,002 (2003 est.) | 
			
			
			| Military expenditures - dollar figure: | $276.7 billion (FY99 est.) | 
			
			
			| Military expenditures - percent of GDP: | 3.2% (FY99 est.) | 
			
			
			| Military - note: | note: 2002 estimates for military manpower are based on projections that do not take into consideration the results of the 2000 census |