Constituted 5 August 1917 as the 84th Division.
Organized 25 August 1917 at Camp Zachery Taylor, Kentucky.
Inactivated 26 July 1919 at Camp Zachery Taylor, Kentucky.
Activated 28 September 1921 with headquarters at Indianapolis, Indiana.
Ordered into active military service 15 October 1942 and reorganized at Camp Howze, Texas as the 84th Infantry Division.
Inactivated 21 January 1946 at Camp Kilmer, New Jersey.
Activated 24 September 1947 with headquarters at Madison, Wisconsin.
Major General Alexander R. Bolling - Assumed command June 1944
Headquarters, 84th Infantry Division
Headquarters Company, 84th Infantry Division
84th Cavalry Reconnaissance Troop
309th Engineer Combat Battalion
333rd Infantry Regiment
334th Infantry Regiment
335th Infantry Regiment
Headquarters and Headquarters Battery, Division Artillery
325th Field Artillery Battalion
326th Field Artillery Battalion
327th Field Artillery Battalion
909th Field Artillery Battalion
Headquarters, Special Troops
309th Medical Battalion
784th Ordnance Light Maintenance Company
84th Signal Company
84th Quartermaster Company
Rhineland, Ardennes-Alsace, Central Europe