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 (Corps of Engineers) Thomas Herbert Jackson, 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. As a member of the Division of Construction and Forestry, Colonel Jackson displayed untiring energy and marked ability in the performance of his important duties. His stupendous task was fraught with numerous difficulties, which he overcame with noteworthy success, rendering services of signal worth to the American Expeditionary Forces.