Gules, a triple-towered castle (from the arms of St. Dizier, France) Argent.
That for the regiments and separate battalions of the Indiana Army National Guard: On a wreath of the colors Argent and Gules, a demi-lion rampant Argent, holding in dexter paw a laurel branch Vert.
SERVICE AND FIDELITY.
The silver triple-towered castle, taken from the arms of St. Dizier in France, denotes the World War I service of the organization. The shield is red and the charge is white, the colors of the Corps of Engineers.
The crest is that of the Indiana Army National Guard.
The coat of arms was originally approved for the 113th Engineer Regiment, Indiana National Guard on 26 May 1928. It was redesignated for the 113th Engineer Combat Battalion on 19 November 1943. The insignia was redesignated for the 113th Engineer Battalion, Indiana Army National Guard on 23 September 1963.