There's a relatively new "kid" archives on the block. It's called the U.S. Army Signal Center and Fort Gordon Archives located in Augusta, Georgia. Augusta is not only the home of the Masters Golf Tournament but also the home of the U.S. Army Signal Corps, the army's communicators since 1860.
Coker, Kathryn R.,
"Short Subjects: The United States Army Signal Center and Fort Gordon, a Military Archives in Georgia,"
Provenance, Journal of the Society of Georgia Archivists
Available at: http://digitalcommons.kennesaw.edu/provenance/vol9/iss1/5