The 48th Infantry Brigade Combat Team (48th IBCT) ("Macon Volunteers") is a modular infantry brigade of the Georgia Army National Guard. One of the oldest units in U.S. Army history, the lineage of the 48th Infantry Brigade can be traced back to 1825. It is one of few units in the US military that also saw service as a unit of the Confederate States of America during the American Civil War. Today, the 48th IBCT is part of the U.S. Army's "Associated Units" program where it's aligned under the 3rd Infantry Division, a combined arms (armor and mechanized infantry) combat maneuver unit of the Regular Army.