A gold color metal and enamel device 1 3/16 inches (3.02cm) in height overall consisting of a gold disc surmounted by a white enamel decagon divided horizontally with a gold wavy bar bearing a black enamel arrow with a scarlet arrowhead between a gold fleur-de-lis and a gold Philippine sunburst, overall a scarlet enamel saltire, at the top a semi-circular gold scroll folded back at each side and inscribed "Dixie" and a scroll of the like in base inscribed "Brigade" all in black letters.
The scarlet cross of St. Andrew on the white field was suggested by the State Flag of Alabama. The ten sides of the decagon allude to the unit's history of ten campaigns of Confederate service in the Civil War. The fleur-de-lis symbolizes the unit's participation in World War I. The sunburst represents the organization's Philippine Presidential Unit Citation for service in the Southern Philippines, World War II; the scarlet arrowhead alluding to the unit's assault landing at New Guinea. The black arrow represents the area's Indian heritage, the Black Warrior River and the city of Tuscaloosa situated on the banks of the river where the unit was originally organized in early 1861 as the Warrior Guards. Tuscaloosa is the present home station. The disc symbolizes the unit's speed and mobility. The color yellow (gold) is used for Armor.
The distinctive unit insignia was approved on 12 August 1974. The insignia was redesignated effective 30 September 2002, with description updated, for the 31st Chemical Brigade.