Kammala wannan jumla: A ranar 19 ga Satumba, 1917, an sake sanya wannan Rundunar a matsayin 121st Field Artillery Regiment kuma an sanya shi zuwa 57th Field Artillery Brigade a matsayin wani ɓangare na 32nd Division. Bugu da ƙari, na 32nd Division, bayanan sun nuna cewa 121st Field Artillery Regiment kuma ya goyi bayan 3rd, 47th, 79th, kuma rundunar ta bambanta kanta a cikin manyan kamfen guda shida:
Aisne-Marne, Alsace, Champagne, Lorraine, Meuse-Argonne, da kuma Oise-Aisne. Tare da Janar na Sojojin John J. Pershing na yabo na sirri, rundunar ta karbi yakin basasa na Faransa Croix-de-Guerre tare da Silver Star da aka zana Aisne-Marne da Oise-Aisne. Rundunar 'yan bindiga ta 121 ta yi watsi da shi a sansanin Grant, Illinois, Mayu 17, 1919.