Lieutenant General (LTG) Grunert entered the ranks as an enlisted man in 1898 and in 1901 was commissioned as a 2nd Lieutenant of cavalry. Prior to World War I, he served in the Philippines, and Cuba as well as in the United States. During the War, Grunert served with General Headquarters in France and with I Corps, returning to the United States in 1919 to enter the Army War College. He then served with the 1st Division at Camp Dix, in the Office of the Chief of Staff in Washington, DC, and with the 10th Cavalry. Grunert Attended the Command and General Staff School, then returned to the Army War College as Director of the Military Intelligence Divison Course and the War Plans Division Course. Following various other assignments of increasing importance, he was named Commanding general of the VI Corps Area, then designated Deputy Chief of Staff for Service Commands in Washington. He became Deputy Commander, Eastern Defense Command and First Army, Governor's Island, NY in August, 1943, and was made Commanding General of the Eastern Defense Command and the First Army the following October. Upon the separation of the Eastern Defense Command and the First Army, he remained in command of the Eastern Defense Command, which was consolidated ithe th Central Defense Command in 1944. At that time, he was given additional duty as President of the Pearl Harbor Board. Grunert retired on 31 July 1945.
From the description of George S. Grunert photograph collection, 1898-1945. (US Army, Mil Hist Institute). WorldCat record id: 60037400
George S. Grunert was a United States (U.S.) Army officer. He was a private, corporal and sergeant, Battery B, 2nd Artillery Regiment; 2nd lieutenant, 11th Cavalry Regiment; 1st lieutenant, 5th, 11th, and 3rd Cavalry Regiments; major, 90th Infantry Division; lieutenant colonel and colonel, G-1 and G-4 Headquarters, I Corps and Third (3rd) Army; colonel, 10th and 26th Cavalry Regiments; brigadier general, 23rd Brigade (Philippine Scouts); major general, Philippine Division and Philippine Dept.; major general, VI Corps; major general, 6th Service Command; lieutenant general, Eastern Defense Command.
From the description of The George Grunert papers, 1881-1945. (US Army, Mil Hist Institute). WorldCat record id: 48460438