A Silver color and metal enamel device 1 1/8 inches (2.86 cm) in height overall consisting of a shield blazoned: Azure, a cross Gules fimbriated Argent, in dexter chief two arrows saltirewise of the like, and in sinister base a fleur-de-lis of the last. Attached below a Silver scroll inscribed "AUDAX ET FORTIS" in Blue letters.
Blue is the color used for Infantry. The red cross appears on the Norwegian flag and alludes to the 3d Battalion (99th Infantry Battalion), constituted and activated in 1942, and composed of the citizens of Norway living in the United States and Norwegian speaking Americans. The make-up of the remainder of the Regiment was American personnel from the joint Canadian-American 1st Special Service Force; signified by its badge of two crossed arrows. The fleur-de-lis represents the Regiment's European battle honors awarded for service during World War II. The motto translates "Bold and Brave."
The distinctive unit insignia was approved on 23 August 1954.