Frequently referred to as a unit crest or DUI for short, the Distinctive Unit Insignia worn by personnel in the Georgia Army National Guard’s 110th Combat Service Support Battalion was originally approved for the 560th Engineer Battalion on 15 August 1957. It was subsequently redesignated after the 560th Engineer Battalion was broken up in 1996 and some of its units used to form the HQ, 110th Support Battalion.
The insignia features a counterchanged scarlet and white shield with a wavy, vertical partition running down the center that symbolizes the Chattahoochee River, the waterway on which the unit’s headquarters were located in Columbus, Georgia at the time the insignia was approved. A heraldic tower, also counterchanged in scarlet and white, is a traditional emblem associated with military Engineering. A live oak superimposed on the tower is a sing of strength, as well as the unit’s home in Georgia. "Liberty Is Duty" is the Battalion's motto.
As of Summer of 2023, the 110th Combat Service Support Battalion remains an active unit in the Georgia Army National Guard, where it is assigned to the 78th Troop Command.
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Distinctive Unit Insignias 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.