in
Washington, D.C., 23 September 1919. Pershing is second from left in front row. Marshall is behind Pershing. After the war, Marshall reverted to his permanent rank of captain. In 1919, he became an
aide-de-camp to
General Pershing. Between 1920 and 1924, while Pershing was
Army chief of staff, Marshall worked on a number of projects that focused on training and teaching modern, mechanized warfare. He taught at the
Army War College and was a key planner in the
War Department. He then served as executive officer of the
15th Infantry Regiment in the
Republic of China, where he remained for three years and learned to speak basic Mandarin. In 1927, as a
lieutenant colonel, he was appointed assistant commandant of the
Infantry School at
Fort Benning, where he initiated major changes to modernize command and staff processes, which proved to be of major benefit during
World War II. Marshall placed
Edwin F. Harding in charge of the Infantry School's publications, and Harding became editor of
Infantry in Battle, a book that codified the lessons of World War I.
Infantry in Battle is still used as an officer's training manual in the Infantry Officer's Course and was the training manual for most of the infantry officers and leaders of World War II. Marshall's first wife, Elizabeth Carter "Lily" Coles, died in 1927. The following year, while stationed at Fort Benning, Marshall met
Katherine Tupper Brown at a dinner party. They married on 15 October 1930, at Emmanuel Episcopal Church in
Baltimore, Maryland. The wedding made headlines as General Pershing served as Marshall's best man. From June 1932 to June 1933, Marshall was the commanding officer of the
8th Infantry Regiment at
Fort Screven,
Georgia. From July 1933 to October 1933 he was commander of
Fort Moultrie, South Carolina, and District I of the
Civilian Conservation Corps. He was promoted to colonel in September 1933. During the
Great Depression, Marshall became a strong supporter of President
Franklin D. Roosevelt and the
New Deal. Army chief of staff
Douglas MacArthur, who was a Republican and with whom Marshall had a contentious relationship, did not appreciate Marshall's views. After only a few months at Ft. Moultrie, MacArthur engineered Marshall's abrupt transfer to Chicago, where he served as senior instructor and chief of staff for the Illinois National Guard's
33rd Division from November 1933 to August 1936. Marshall was assigned to command the 5th Brigade of the
3rd Infantry Division and
Vancouver Barracks in
Vancouver, Washington, from 1936 to 1938, and was promoted to brigadier general in October 1936. In addition to obtaining a long-sought and significant troop command, traditionally viewed as an indispensable step to the pinnacle of the US Army, Marshall was also responsible for 35 Civilian Conservation Corps (CCC) camps in Oregon and southern Washington. As post commander Marshall made a concerted effort to cultivate relations with the city of Portland and to enhance the image of the US Army in the region. With the CCC, he initiated a series of measures to improve the morale of the participants and to make the experience beneficial in their later life. He started a newspaper for the CCC region that provided a vehicle to promote CCC successes, and he initiated a variety of programs that developed participants' skills and improved their health. Marshall's inspections of the CCC camps gave him and his wife Katherine the chance to enjoy the beauty of the American
Pacific Northwest and made that assignment what he called "the most instructive service I ever had, and the most interesting." In July 1938, Marshall was assigned to the War Plans Division in
Washington, D.C., and subsequently reassigned as Deputy Chief of Staff. In that capacity, then-Brigadier General Marshall attended a White House conference at which President
Franklin D. Roosevelt proposed a plan to expand the
United States Army Air Corps by 15,000 aircraft per year in preparation for World War II. With all other attendees voicing support, Marshall was the only one to disagree, pointing out the lack of consideration for logistical support or training. Marshall also spoke in favor of a large ground army although Roosevelt had said a large air force would be a greater deterrent to enemies, pointing out that the
United States Army did not yet have a single division at full operational strength. Roosevelt favored Marshall because he was more supportive of
New Deal liberalism than the
conservative and still-influential
Douglas MacArthur, who had been chief of staff from 1930 to 1935, and because of the recommendations of Pershing, Craig,
Louis A. Johnson, and Roosevelt's close advisor
Harry Hopkins. He held this post until retiring in November 1945. At the time of the appointment, Marshall was 34th overall in seniority, outranked by 21 major generals and 11 brigadier generals, but was fifth in line for the position of chief of staff under an unwritten rule that candidates should be able to serve a full four-year term before reaching the mandatory retirement age of 64. On 11 May 1940, the
United States Congress cut $10 million from a $28 million appropriation budget for equipment to detect
Imperial Japanese Armed Forces aircraft off the
West Coast of the United States. Marshall met with
Secretary of the Treasury Henry Morgenthau Jr. and they went to see Roosevelt; Marshall emphasized the supreme importance of getting the full amount and told Roosevelt "you have got to do something and you've got to do it today". Marshall's advocacy worked and he got "all he wanted and more". In 1941, Marshall became a
Freemason, raised "at sight" by the
grand master of the Grand Lodge of the District of Columbia. ("At sight" is the procedure by which a grand master confers on a candidate all three Masonic degrees – Apprentice, Fellowcraft, and Master – at one time.) ==World War II==