ENDescription
Located in the War Department building in Washington, D. C., the United States Military Telegraph Office was a centralized office created in 1861. The United States Military Telegraph Office served as the headquarters for the United States Military Corps where ciphers coded and decoded messages, maintaining communications between the federal government in Washington D. C. and the commanding officers of the Union Army on the warfront. (Wikipedia; "The War Effort: The Telegraph Office," Mr. Lincoln's White House)
See also: https://en.wikipedia.org/wiki/U.S._Military_Telegraph_Corps
Latitude: 38.90472
Longitude: -77.01639
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