Joint Base Myer-Henderson Hall

Joint Base Myer-Henderson Hall
Arlington County, Virginia
Shoulder sleeve insignia of units stationed at Fort Myer
Type	Military Base
Site information
Controlled by	United States Army
Website	Official Website
Site history
Built	1861 (First as Fort Cass, and June 1863 as Fort Whipple)
In use	1861–present
Garrison information
Current commander	Colonel Patrick M. Duggan
Garrison	3rd US Infantry Regiment (The Old Guard) United States Army Band (Pershing's Own)

Joint Base Myer-Henderson Hall is a Joint Base of the United States military that is located around Arlington, Virginia which is made up of Fort Myer (Arl), Fort McNair (SW DC), and Henderson Hall. It is the local residue of the Base Realignment and Closure, 2005 process. It is commanded by the United States Army but has resident commands of Army, Navy, & Marines. Most conspicuous is the Arlington National Cemetery Honor Guard.

The two eponymous bases are co-located along the west boundary of the cemetery, and Fort McNair is across the Potomac River, in Washington, DC, on the Anacostia River.

On Fort McNair sits Grant Hall which is the location of the 1865 military tribunal of the conspirators of the Assassination of Abraham Lincoln. Each quarter the Hall is open to the public where people can visit the courtroom and learn more about the trials.

Fort Myer is headquarters to service personnel working throughout the National Capital Region. The post provides housing, support, and services to thousands of active-duty, reserve, and retired military, members of the U.S. Coast Guard, and their families stationed in the United States Army Military District of Washington. The JBMHH's mission is to operate the Army's community and support Homeland Security in the nation's capital.