- First World War (1914-1918)
- Supply Section, General Staff, 1st Army, American Expeditionary Forces
- Awarded on:
"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 (Infantry) John Lesesne De Witt, 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. Colonel De Witt organized the Supply Section of the General Staff of the 1st Army and successfully administered this important section during all the operations of that command. The results obtained by his untiring efforts and brilliant professional ability had a marked influence on the successes attained by the 1st Army."
War Department, General Orders No. 59