Constitute 5 August 1917 as the 90th Division.
Organized 25 August 1917 at Camp Travis, Texas.
Inactivated 17 June 1919 at Camp Bowie, Texas.
Activated in October 1921 with headquarters at San Antonio, Texas.
Ordered into active military service 25 March 1942 and reorganized at Camp Barkeley, Texas.
Redesignated 1 August 1942 as the 90th Infantry Division.
Reorganized and redesignated 15 September 1942 as the 90th Motorized Division.
Reorganized and redesignated 1 May 1943 as the 90th Infantry Division.
Inactivated 27 December 1945 at Camp Shanks, New York.
Activated 4 August 1947 with headquarters at Dallas, Texas.
Brigadier General Jay W. McKelvie - Assumed command January 1944
Major General Eugene M. Landrum - Assumed command June 1944
Major General Raymond S. McLain - Assumed command July 1944
Major General James A. Van Fleet - Assumed command October 1944
Major General Lowell W. Hooks - Assumed command January 1945
Major General Herbert L. Ernest - Assumed command March 1945
Headquarters, 90th Infantry Division
Headquarters Company, 90th Infantry Division
90th Cavalry Reconnaissance Troop
315th Engineer Combat Battalion
357th Infantry Regiment
358th Infantry Regiment
359th Infantry Regiment
Headquarters and Headquarters Battery, Division Artillery
343rd Field Artillery Battalion
344th Field Artillery Battalion
345th Field Artillery Battalion
915th Field Artillery Battalion
Headquarters, Special Troops
315th Medical Battalion
790th Ordnance Light Maintenance Company
90th Signal Company
90th Quartermaster Company
Normandy (with arrowhead), Northern France, Rhineland, Ardennes-Alsace, Central Europe