1-321 FAR traces its lineage to Battery A, 321st Field Artillery, which organized on 2 September 1917 at Camp Gordon, Georgia. After training at Camp Gordon until May 1918, the battery shipped to France, and participated with the regiment in the St. Mihiel, Meuse Argonne and Lorraine 1918 campaigns. Following the Armistice, the battery redeployed to the United States and was demobilized at Camp Dix, New Jersey in May 1919.