<Table> <Tr> <Th_colspan="2"> United States Armed Forces </Th> </Tr> <Tr> <Td_colspan="2"> The seals of the five service branches of the U.S. Armed Forces </Td> </Tr> <Tr> <Th> Founded </Th> <Td> 14 June 1775; 243 years ago (1775 - 06 - 14) </Td> </Tr> <Tr> <Th> Service branches </Th> <Td> United States Army United States Marine Corps United States Navy United States Air Force United States Coast Guard </Td> </Tr> <Tr> <Th> Headquarters </Th> <Td> The Pentagon, Arlington County, Virginia, U.S. </Td> </Tr> <Tr> <Th_colspan="2"> Leadership </Th> </Tr> <Tr> <Th> Commander - in - Chief </Th> <Td> President Donald Trump </Td> </Tr> <Tr> <Th> Secretary of Defense </Th> <Td> James Mattis </Td> </Tr> <Tr> <Th> Secretary of Homeland Security </Th> <Td> Kirstjen Nielsen </Td> </Tr> <Tr> <Th> Chairman of the Joint Chiefs of Staff </Th> <Td> <P> Gen Joseph Dunford, USMC </P> </Td> </Tr> <Tr> <Th> Vice Chairman of the Joint Chiefs of Staff </Th> <Td> Gen Paul J. Selva, USAF </Td> </Tr> <Tr> <Th> Senior Enlisted Advisor to the Chairman </Th> <Td> CSM John W. Troxell, USA </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th_colspan="2"> Manpower </Th> </Tr> <Tr> <Th> Military age </Th> <Td> 17 with parental consent, 18 for voluntary service . Maximum age for first - time enlistment is 35 for the Army, 28 for the Marine Corps, 34 for the Navy, 39 for the Air Force and 27 for the Coast Guard . </Td> </Tr> <Tr> <Th> Active personnel </Th> <Td> 1,281,900 (ranked 3rd) </Td> </Tr> <Tr> <Th> Reserve personnel </Th> <Td> 811,000 </Td> </Tr> <Tr> <Th_colspan="2"> Expenditures </Th> </Tr> <Tr> <Th> Budget </Th> <Td> US $610 billion (2017) (ranked 1st) </Td> </Tr> <Tr> <Th> Percent of GDP </Th> <Td> 3.1% (2017) </Td> </Tr> <Tr> <Th_colspan="2"> Industry </Th> </Tr> <Tr> <Th> Domestic suppliers </Th> <Td> List </Td> </Tr> <Tr> <Th_colspan="2"> Related articles </Th> </Tr> <Tr> <Th> History </Th> <Td> <P> Military history of the United States </P> List of engagements <P> American Revolutionary War Whiskey Rebellion Indian Wars Barbary Wars War of 1812 Patriot War Mexican--American War Utah War Cortina Troubles Reform War American Civil War </P> <Ul> <Li> New York City draft riots </Li> </Ul> <P> Las Cuevas War Spanish--American War Banana Wars Philippine--American War Boxer Rebellion Border War World War I Russian Civil War World War II Cold War </P> <Ul> <Li> Puerto Rican Nationalist Revolts </Li> <Li> Korean War </Li> <Li> 1958 Lebanon crisis </Li> <Li> Dominican Civil War </Li> <Li> Bay of Pigs Invasion </Li> <Li> Cuban Missile Crisis </Li> <Li> Vietnam War </Li> <Li> Korean DMZ Conflict </Li> <Li> Operation Eagle Claw </Li> <Li> Multinational Force Lebanon </Li> <Li> Invasion of Grenada </Li> <Li> Operation Golden Pheasant </Li> <Li> Invasion of Panama </Li> </Ul> <P> Persian Gulf War Somali Civil War </P> <Ul> <Li> Operation Gothic Serpent </Li> <Li> Battle of Mogadishu </Li> </Ul> <P> Bosnian War </P> <Ul> <Li> Operation Deliberate Force </Li> <Li> Operation Deny Flight </Li> </Ul> <P> Kosovo War </P> <Ul> <Li> Operation Allied Force </Li> </Ul> <P> Global War on Terrorism </P> <Ul> <Li> Operation Enduring Freedom <Ul> <Li> War in Afghanistan </Li> <Li> Philippines </Li> <Li> Horn of Africa </Li> <Li> Trans Sahara </Li> </Ul> </Li> <Li> Iraq War </Li> <Li> War in North - West Pakistan </Li> </Ul> <P> Military deployment after Hurricane Katrina Pakistan--United States skirmishes Intervention against ISIL Other </P> </Td> </Tr> <Tr> <Th> Ranks </Th> <Td> <P> Army </P> <Ul> <Li> Army officer </Li> <Li> Army warrant officer </Li> <Li> Army enlisted </Li> </Ul> <P> Marine Corps </P> <Ul> <Li> Marine Corps officer </Li> <Li> Marine Corps warrant officer </Li> <Li> Marine Corps enlisted </Li> </Ul> <P> Navy </P> <Ul> <Li> Navy officer </Li> <Li> Navy warrant officer </Li> <Li> Navy enlisted </Li> </Ul> <P> Air Force </P> <Ul> <Li> Air Force officer </Li> <Li> Air Force enlisted </Li> </Ul> <P> Coast Guard </P> <Ul> <Li> Coast Guard officer </Li> <Li> Coast Guard warrant officer </Li> <Li> Coast Guard enlisted </Li> </Ul> </Td> </Tr> </Table> <Tr> <Th_colspan="2"> United States Armed Forces </Th> </Tr>

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