A New York city-based doctor, Glentworth Reeve Butler, 1855-1926, joined the U.S. Army shortly after war was declared on Germany in April, 1918. He was hired as a contract surgeon with the rank of major and lectured on cardiovascular diseases to Army Medical Corps student officers at Fort Riley, KS and Camp Jackson, SC. After the armistice in November, 1918, Butler was ordered to visit army hospitals in Iowa, Michigan, Indiana, Kansas, Kentucky, New Jersey, New York and Pennsylvania and report on their overall conditions. He continued this work through at least May, 1919 and was promoted to lieutenant colonel.
From the description of Glentworth Reeve Butler papers, 1917-1919. (National Library of Medicine). WorldCat record id: 14309814
From the guide to the Glentworth Reeve Butler Papers, 1917-1929, (History of Medicine Division. National Library of Medicine)