Constituted 18 July 1917 as the 26th Division.
Organized 22 August 1917 near Boston, Massachusetts.
Inactivated 9 May 1919 at Camp Devens, Massachusetts.
Activated 21 March 1923 with headquarters at Boston, Massachusetts.
Ordered into active federal service 16 January 1941.
Reorganized and redesignated 1 April 1942 as the 26th Infantry Division.
Inactivated 20 December 1945 at Camp Myles Standish, Massachusetts.
Activated 13 November 1946 with headquarters at Boston, Massachusetts.
Major General Willard S. Paul - Assumed command August 1943
Headquarters, 26th Infantry Division
Headquarters Company, 26th Infantry Division
26th Cavalry Reconnaissance Troop
101st Engineer Combat Battalion
101st Infantry Regiment
104th Infantry Regiment
328th Infantry Regiment
Headquarters and Headquarters Battery, Division Artillery
101st Field Artillery Battalion
102nd Field Artillery Battalion
180th Field Artillery Battalion
263rd Field Artillery Battalion
Headquarters, Special Troops
114th Medical Battalion
726th Ordnance Light Maintenance Company
39th Signal Company
26th Quartermaster Company
Northern France, Rhineland, Ardennes-Alsace, Central Europe