Shield
Crimson, surmounting a mace bendwise Or a fess of the like charged with a Korean temple Azure (Light Blue).
Crest
On a wreath of the colors, Or and Gules (Crimson), a broad arrow of the first charged on the ferrule with a fleur-de-lis Vert and surmounted by a fire ball enflamed saltirewise Azure bearing throughout a yin yang symbol Gules and of the last and three bendlets sinister Argent.
Motto
MAINTAIN.
Shield
Crimson and yellow are the colors for the Ordnance Corps, alluding to the predecessor Battalion. The mace, taken from the coat of arms of Colmar, symbolizes that Battalion's award for distinguished service in that area during World War II. The oriental temple, in a color from the Korean service ribbon, represents the organization's Korean decorations.
Crest
Crimson and light blue are the colors used for Maintenance units; crimson and yellow are the colors for Ordnance units. These colors represent the former designations of the Battalion. Blue is for Infantry and represents the unit's association with Infantry Divisions. The white bendlets, suggested by the shoulder sleeve insignia of the 3d Infantry Division, refer to the unit's long ordnance maintenance support of that Division. The fleur-de-lis represents the European Theater of Operations after the campaign in Tunisia. The broad arrow represents the unit's amphibious assault at the Anzio beachhead. The yin yang symbol simulates a Taeguk and refers to Korea where the organization participated in eight campaigns during the Korean Conflict. The four flames and the color red symbolize the four Meritorious Unit Commendation streamers inscribed "ITALY," "EUROPEAN THEATER," "KOREA 1950-1951," and "KOREA 1953." The green and red along with the fleur-de-lis represent the award of the French Croix de Guerre, World War II Fourragere. The two Republic of Korea Presidential Unit Citations, "UIJONGBU CORRIDOR" and "IRON TRIANGLE," and Bravery Gold Medal of Greece streamer, embroidered "KOREA," are represented by the yin yang symbol.
The coat of arms was originally approved for the 703d Ordnance Battalion on 21 October 1954. It was redesignated for the 703d Maintenance Battalion on 17 April 1964. It was redesignated for the 703d Support Battalion with symbolism amended on 14 September 1987. The insignia was amended to add a crest on 12 February 1990. It was amended to correct the symbolism of the crest and to correct the numerical designation of the Infantry Division to read "3d" vice "30th" on 17 September 1990.