Constituted 5 August 1917 as the 81st Division.
Organized 25 August 1917 at Camp Jackson, South Carolina.
Inactivated 1 June 1919 at Hoboken, New Jersey.
Activated 23 September 1921 with headquarters at Nashville, Tennessee.
Ordered into active military service 15 June 1942 and reorganized at Camp Rucker, Alabama.
Redesignated 1 August 1942 as the 81st Infantry Division.
Inactivated 20 January 1946 in Japan.
Activated 10 November 1947 with headquarters in Atlanta, Georgia.
Major General Paul J. Mueller - Assumed command June 1942
Headquarters, 81st Infantry Division
Headquarters Company, 81st Infantry Division
81st Cavalry Reconnaissance Troop
306th Engineer Combat Battalion
321st Infantry Regiment
322nd Infantry Regiment
323rd Infantry Regiment
Headquarters and Headquarters Battery, Division Artillery
316th Field Artillery Battalion
317th Field Artillery Battalion
318th Field Artillery Battalion
906th Field Artillery Battalion
Headquarters, Special Troops
306th Medical Battalion
781st Ordnance Light Maintenance Company
81st Signal Company
81st Quartermaster Company
Western Pacific, Leyte