The 79th Troop Command Distinctive Unit Insignia was originally approved on 5 January 1939 while the unit was designated as the 51st Field Artillery Brigade. It was redesignated on 14 May 1982 for Headquarters and Headquarters Battery, 26th Infantry Division Artillery, and again on 15 August 2011 for the 79th Troop Command, a unit of the Massachusetts Army National Guard (ARNG).
Its affiliation with the Massachusetts ARNG is signified on this insignia by the n embowed arm grasping a broadsword on a scarlet background is a reference to the units of the Massachusetts Army National Guard which primarily made up the 26th Infantry Division, the unit to which the 51st Field Artillery Brigade was assigned to at the time the insignia was first approved. Six stars stand for the six major engagements the Division fought in during its initial combat service in World War I while assigned to the 26th “Yankee” Infantry Division (Champagne-Marne, Aisne-Marne, St. Mihiel, Meuse-Argonne, Ile de France 1918, and Lorraine 1918).
Redesignated as the 26th Division Artillery in 1942, the unit would serve again with the Yankee Division in four World War II campaigns; its Headquarters and Headquarters Battery was cited in the Order of the Day of the Belgian Army for its exceptional service during the Battle of the Bulge.