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The 3d U.S. Infantry, traditionally known as "The Old Guard," is the oldest active-duty infantry unit in the Army, serving our nation since 1784. The Old Guard is the Army's official ceremonial unit and escort to the president, and it also provides security for Washington, D.C., in time of national emergency or civil disturbance.
Army Mission; Direct Reporting Unit to Headquarters, Department of the Army. Conducts and supports multiple, diverse Army and Joint missions. Five subordinate commands, plus Senior Commander responsibilities over four geographically dispersed installations and four additional agencies.