George Marshall - World War I

World War I

During the First World War, he had roles as a planner of both training and operations. He went to France in mid-1917 as the director of training and planning for the 1st Infantry Division. In mid-1918, he was promoted to American Expeditionary Forces headquarters, where he worked closely with his mentor General John J. Pershing and was a key planner of American operations. He was instrumental in the design and coordination of the Meuse-Argonne offensive, which contributed to the defeat of the German Army on the Western Front.