Constituted 5 August 1917 as the 77th Division.
Organized 18 August 1917 at Camp Upton, New York.
Inactivated 9 May 1919 at Camp Upton, New York.
Activated in September 1921 with headquarters at New York, New York.
Ordered into active military service 25 March 1942 and reorganized at Fort Jackson, South Carolina.
Redesignated 1 August 1942 as the 77th Infantry Division.
Inactivated 15 March 1946 in Japan.
Activated 1 November 1946 with headquarters in New York, New York.
Major General Andrew D. Bruce - Assumed command May 1943
Headquarters, 77th Infantry Division
Headquarters Company, 77th Infantry Division
77th Cavalry Reconnaissance Troop
302nd Engineer Combat Battalion
305th Infantry Regiment
306th Infantry Regiment
307th Infantry Regiment
Headquarters and Headquarters Battery, Division Artillery
304th Field Artillery Battalion
305th Field Artillery Battalion
306th Field Artillery Battalion
902nd Field Artillery Battalion
Headquarters, Special Troops
302nd Medical Battalion
777th Ordnance Light Maintenance Company
77th Signal Company
77th Quartermaster Company
Western Pacific, Leyte (with arrowhead), Ryukyus