3rd U.S. Infantry, "The Old Guard"

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3rd U.S. Infantry, "The Old Guard"The 3d U.S. Infantry, traditionally known as "The Old Guard," will demonstrate authentic 18th century battle tactics and musket firing as well as fife and drum music.

The "The Old Guard" is the oldest active-duty infantry unit in the U.S. Army, serving our nation since 1784. The Old Guard is the Army's official ceremonial unit and escort to the president, and also provides security for Washington, D.C. in time of national emergency or civil commotion. 

See also: The History List Guide to Patriots' Day, including the complete list of activities before, during, and after Patriots' Day.