Constituted 5 May 1942 as the 9th Armored Division.
Activated 15 July 1942 at Fort Riley, Kansas.
Inactivated 13 October 1945 at Camp Patrick Henry, Virginia.
Major General John W. Leonard - Assumed command October 1942
Headquarters and Headquarters Company, 9th Armored Division
89th Cavalry Reconnaissance Squadron
9th Armored Engineer Battalion
Headquarters and Headquarters Company, Combat Command A, 9th Armored Division
Headquarters and Headquarters Company, Combat Command B, 9th Armored Division
Headquarters, Reserve Command, 9th Armored Division
2nd Tank Battalion
14th Tank Battalion
19th Tank Battalion
27th Armored Infantry Battalion
52nd Armored Infantry Battalion
60th Armored Infantry Battalion
Headquarters and Headquarters Battery, Division Artillery
3rd Armored Field Artillery Battalion
16th Armored Field Artillery Battalion
73rd Armored Field Artillery Battalion
Headquarters and Headquarters Company, Division Trains
2nd Armored Medical Battalion
131st Armored Ordnance Battalion
149th Armored Signal Company
Rhineland, Ardennes-Alsace, Central Europe