Authorised 6 January 1930
A silver color metal and enamel device 1 1/8 inches (2.86cm) in height overall consisting of a shield blazoned: Azure, a bend wavy between a fleur-de-lis and a giant cactus Argent; on a chief of the last a Great Bear's face of the like fimbriated of the first, lips and tongue Gules. Attached below the shield is a blue motto scroll inscribed "LET'S GO" in silver letters.
The shield is blue for Infantry. The wavy bend, representing the Arkansas River, refers to the geographic location of the regiment. The cactus symbolizes service on the Mexican border and the fleur-de-lis service in France during World War I. The Great Bear's face from the shoulder sleeve insignia of the Alaskan Department symbolizes service in that area in World War II.
The distinctive unit insignia was originally approved for the 153d Regiment infantry on 6 Jan 1930. It was amended on 30 Jun 1930. On 4 Jun 1951 the insignia was amended to show additional war service. Coat of Arms