5. MC / Arlington

38°52'26"N 77° 4'46"W USMC Arlington, Virginia a.k.a. Joint Base Henderson Hall http://upload.wikimedia.org/wikipedia/commons/f/fe/Henderson_hall_logo.jpg
- Headquarters US Marine Corps (HQMC) http://www.hqmc.marines.mil/Agencies/Headquarters-and-Service-Battalion/, consisting of the Commandant of the Marine Corps and those staff agencies that advise and assist him in discharging his responsibilities prescribed by law and higher authority.

The US Marine Corps has a strength of 202,100 active duty and 39,600 reserve marines.
It is the smallest of the US armed forces in the DoD.

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