Constituted 19 October 1920 as the 43rd Division.
Organized 21 March 1925 with headquarters at South Manchester, Connecticut.
Ordered into federal service 24 February 1941 at New London, Connecticut.
Reorganized and redesignated 19 February 1942 as the 43rd Infantry Division.
Inactivated 1 November 1945 at Camp Stoneman, California.
Activated 15 October 1946 with headquarters at Hartford, Connecticut.
Major General John H. Hester - Assumed command February 1942
Major General John R. Hodge - Assumed command July 1943
Major General Leonard F. Wing - Assumed command August 1943
Headquarters, 43rd Infantry Division
Headquarters Company, 43rd Infantry Division
43rd Cavalry Reconnaissance Troop
118th Engineer Combat Battalion
103rd Infantry Regiment
169th Infantry Regiment
172nd Infantry Regiment
Headquarters and Headquarters Battery, Division Artillery
103rd Field Artillery Battalion
152nd Field Artillery Battalion
169th Field Artillery Battalion
192nd Field Artillery Battalion
Headquarters, Special Troops
118th Medical Battalion
743rd Ordnance Light Maintenance Company
43rd Signal Company
43rd Quartermaster Company
Guadalcanal, New Guinea, Northern Solomons, Luzon (with arrowhead)