A gold color metal and enamel device 1 3/16 inches (3.02 cm) in height overall consisting of a vertical rectangle rounded at each end and bordered with twelve rivets, in the center a gold quadrate (point up) on a red disc, bordered with a black ring, overall four green wavy bars in saltire with arrowhead points to center, all above a green semi-circular scroll inscribed FORWARD WITH VALOR in gold letters.
The 264th Engineer Group was descended from the 264th Armor Group, the wavy bars over the red disc symbolizing the latters four battle honors in World War II: Rome-Arno, Naples-Foggia, North Apennines, and Po Valley. The background simulates a Roman shield while the red and green are taken from the national colors of Italy. The home station of the unit at Eau Claire, Wisconsin, is also symbolized by the four wavy bars converging at the center which alludes to the meeting of the waters (the Indian meaning for Wisconsin). The black annulet represents the units mobility.
The distinctive unit insignia was originally approved for the 264th Armor Group on 27 May 1970. It was redesignated for the 264th Engineer Group and amended to revise the symbolism on 6 July 1972.