Constituted 12 March 1879 as The Division Of The National Guard of Pennsylvania, and organized with headquarters at Philadelphia, Pennsylvania.
Ordered into active federal service 29 June 1916 at Mount Gretna, Pennsylvania and concurrently redesignated as the 7th Division.
Relieved from active federal service 23 February 1917 at Philadelphia, Pennsylvania.
Ordered into active federal service 15 July 1917.
Redesignated 1 September 1917 as the 28th Division.
Inactivated 17 May 1917 at Camp Dix, New Jersey.
Activated 22 December 1921 with headquarters at Philadelphia, Pennsylvania.
Ordered into active federal service 17 February 1941 at Harrisburg, Pennsylvania.
Reorganized and redesignated 17 February 1942 as the 28th Infantry Division.
Inactivated 15 December 1945 at Camp Shelby, Mississippi.
Activated 26 November 1946 with headquarters at Harrisburg, Pennsylvania.
Major General Lloyd D. Brown - Assumed command January 1943
Major General Norman D. Cota - Assumed command August 1944
Headquarters, 28th Infantry Division
Headquarters Company, 28th Infantry Division
28th Cavalry Reconnaissance Troop
103rd Engineer Combat Battalion
109th Infantry Regiment
110th Infantry Regiment
112th Infantry Regiment
Headquarters and Headquarters Battery, Division Artillery
107th Field Artillery Battalion
108th Field Artillery Battalion
109th Field Artillery Battalion
229th Field Artillery Battalion
Headquarters, Special Troops
103rd Medical Battalion
728th Ordnance Light Maintenance Company
28th Signal Company
28th Quartermaster Company
Normandy, Northern France, Rhineland, Ardennes-Alsace, Central Europe