Constituted 5 August 1917 as the 85th Division.
Organized 25 August 1917 at Camp Custer, Michigan.
Inactivated 18 April 1919 at Camp Custer, Michigan.
Activated 10 December 1921 with headquarters at Detroit, Michigan.
Ordered into active military service 15 May 1942 and reorganized at Camp Shelby, Mississippi.
Redesignated 1 August 1942 as the 85th Infantry Division.
Inactivated 25 August 1945 at Camp Patrick Henry, Virginia.
Activated 19 February 1947 with headquarters at Litchfield, Illinois.
Major General John B. Coulter - Assumed command February 1943
Headquarters, 85th Infantry Division
Headquarters Company, 85th Infantry Division
85th Cavalry Reconnaissance Troop
310th Engineer Combat Battalion
337th Infantry Regiment
338th Infantry Regiment
339th Infantry Regiment
Headquarters and Headquarters Battery, Division Artillery
328th Field Artillery Battalion
329th Field Artillery Battalion
403rd Field Artillery Battalion
910th Field Artillery Battalion
Headquarters, Special Troops
310th Medical Battalion
785th Ordnance Light Maintenance Company
85th Signal Company
85th Quartermaster Company
Rome-Arno, North Apennines, Po Valley