A Gold color metal and enamel device 1 1/8 inches (2.86 cm) in height overall consisting of a shield blazoned: Gules (Crimson) Thor's hammer Or. Attached below the shield a Gold scroll inscribed "WE FORGE AHEAD" in Red.
Crimson and yellow are colors representative of the Ordnance Corps, the parent organization. The functions of the former unit are symbolized by the hammer of the Norse god Thor, the mythical blacksmith of the gods, to forge thunder bolts, and who was considered as the god of thunder and lightning. The motto, "We Forge Ahead," is indicative of the mission of the parent unit and is expressive of the aspirations of the personnel.
The distinctive unit insignia was originally approved for the 8th Ordnance Battalion on 18 February 1943. It was rescinded on 2 November 1951. It was reinstated on 8 January 1953. It was redesignated for the 8th Maintenance Battalion on 30 November 1965. The insignia was redesignated for the 18th Support Battalion with the description and symbolism revised effective 15 July 1993.