 In June 1932, Krueger became commander of the 6th Infantry Regiment at Jefferson Barracks, Missouri, where he was promoted to colonel again on 1 August 1932. Now aged 51, he became resigned to retiring as a colonel, but in 1934 he returned to the War Plans Division, becoming chief of the division in May 1936, and was promoted to temporary brigadier general in October 1936. In September 1938, Krueger went to Fort George G. Meade, Maryland, as commander of the 16th Infantry Brigade. He was promoted to temporary major general in February 1939, when he became commander of the 2nd Infantry Division at Fort Sam Houston, Texas. The 2nd Infantry Division was at the time being used as a test of the US Army's new triangular division concept. As a result, Krueger made a series of suggestions as to how the organization could be improved. He became interested in the possibilities of mechanization and fast-paced modern warfare, which were tested in maneuvers with his division. His troops called themselves the "Blitzkruegers".
