The President of the United States of America, authorized by Act of Congress, July 9, 1918, takes pleasure in presenting the Army Distinguished Service Medal to Colonel (Cavalry) Adna Romanza Chaffee, Jr. (ASN: 0-2136), United States Army, for exceptionally meritorious and distinguished services to the Government of the United States, in a duty of great responsibility during World War I. At Army General Staff College Colonel Chaffee displayed military attainments of a high order, contributing efficiently to the training of a large number of officers. He performed tasks of great difficulty with marked distinction as G-3 of the 81st Division and later of the 7th Corps. Later, as Chief of the Third Section, General Staff, 3d Corps, he acted with sound judgment and wide comprehension of existing conditions in the discharge of the grave responsibilities connected with his office during the closing days of the Meuse-Argonne offensive, handling perplexing problems with keen energy and wise discernment.