values. After the United States commenced hostilities against Germany in April 1917, Krueger was assigned to the 84th Infantry Division at Camp Zachary Taylor as its Assistant Chief of Staff G-3 (Operations). He became its chief of staff, with the rank of major as of 5 August 1917. In February 1918, he was sent to Langres, France, to attend the American Expeditionary Force General Staff School. All officers from divisions that were not under orders for France were ordered to return home in May 1918, but Krueger stayed on as G-3 of the 26th Infantry Division. The French Army requested that Krueger be sent home due to his German origin, and Krueger was re-posted to the 84th Division, but he soon returned to France, as the 84th Division embarked for France in August 1918. He was not destined to remain with the division for very long, however, as in October he became chief of staff of the Tank Corps. After the Armistice of 11 November 1918 ended the fighting, he became assistant chief of staff of VI and IV Corps on occupation duty, advancing to the rank of temporary colonel. For his service in the war, he was awarded the Army Distinguished Service Medal in 1919. The citation for his DSM reads: Interwar years With the end of the war, Krueger returned to the United States on 22 June 1919 and was initially posted to the Infantry School at Fort Benning, Georgia. In 1920, he assumed command of the 55th Infantry Regiment at Camp Funston, Kansas. He reverted to his permanent rank of captain on 30 June 1920 but was promoted to the permanent rank of major the next day. He attended the Army War College, graduating in 1921, and remaining for a year as an instructor, where he taught such classes as the "Art of Command". He paid a four-month visit to Germany in 1922 as part of the War College's Historical Section, during which he examined documents related to World War I in the German War Archives. These informed his lectures on the war, and he argued that much of the German Army's effectiveness was attributable to its system of decentralized command. Krueger urged that American commanders in the field should be given wider latitude in carrying out their orders. From 1922 to 1925, Krueger served in the War Plans Division of the War Department General Staff in