Approved on 1 February 2008, the Distinctive Unit Insignia (unit crest) of the Special Troops Battalion, 28th Infantry Division employs a tricolor scheme to suggest the branches represented by the units that comprise a Special Troops Battalion: cobalt blue for Military Intelligence, buff for Quartermaster and Division Support Command, and orange for Signal (the Battalion was also organized with elements of the former 28th Signal Battalion.)
The insignia’s reversed pall (heraldic term for a Y-shaped design) symbolizes the Division’s Headquarters continuing service as the 28th Division Mobile Command Post, Main Command Post, and Tactical Command Post. A red keystone in the center is a reference both to the 28th Infantry Division (its Shoulder Sleeve Insignia is a keystone) and the home state of both the 28th Infantry Division and the Special Troops Battalion (Pennsylvania is the “keystone state”). The unit motto, “Iron Support,” is a reference to the 28th Infantry Division’s nickname “Iron Division” that it was given by General John J. “Black Jack” Pershing during World War I.
The Distinctive Unit Insignia is worn by all Soldiers (except General Officers) in units that have been authorized to be issued the device. It is worn centered on the shoulder loops of the Army Green Service Uniform (AGSU) and the blue Army Service Uniform (ASU, Enlisted only) with the base of the insignia toward the outside shoulder seam. DUIs are not worn on the Dress variations of either uniform, however.