Àwọn Iṣẹ́ Ológun Amẹ́ríkà

United States armed forces
United States Joint Service Color Guard on parade at Fort Myer in Arlington County, Virginia.
Service branches	U.S. Army U.S. Marine Corps U.S. Navy U.S. Air Force U.S. Coast Guard
Leadership
Commander-in-Chief	President Barack Obama
Secretary of Defense	Robert M. Gates
Chairman, Joint Chiefs of Staff	Admiral Michael Mullen
Manpower
Military age	17–45 years old
Available for military service	72,715,332 males, age 18–49 (2008 est.), 71,638,785 females, age 18–49 (2008 est.)
Fit for military service	59,413,358 males, age 18–49 (2008 est.), 59,187,183 females, age 18–49 (2008 est.)
Reaching military age annually	2,186,440 males (2008 est.), 2,079,688 females (2008 est.)
Active personnel	1,473,900 (ranked 2nd)
Reserve personnel	1,458,500
Expenditures
Budget	$692 billion (FY10) (1st by total expenditure, 27th as percent of GDP)
Percent of GDP	4.7 (2010 est.)
Related articles
History	American Revolutionary War Early national period Continental expansion American Civil War Post-Civil War era World War I (1917–1918) World War II (1941–1945) Cold War (1945–1991) War on Terrorism (2001–present)
Ranks	Army officer Army warrant officer Army enlisted Marine Corps officer Marine Corps warrant officer Marine Corps enlisted Navy officer Navy warrant officer Navy enlisted Air Force officer Air Force enlisted Coast Guard officer Coast Guard warrant officer Coast Guard enlisted