Certificate of promotion issued by United States Army for Hamilton Coolidge, October 3, 1918. Certifies Coolidge's promotion to Captain in the United States Army.
Certificate of honorable discharge for Hamilton Coolidge, October 3, 1917. Certifies his release from the Reserve Corps so he could take a commission with the Allied Expeditionary Force. Includes Coolidge's enlistment record. Two pages.
Operations Order No. 145, Operations Office, 94th Aero Squadron, September 24, 1918. Gives a schedule of operations for the 94th Aero Squadron, effective September 25, 1918. One typed page.
Operations Office memo, Operations Office, 94th Aero Squadron, September 27, 1918. Gives directions concerning procedures for night flying for the 94th Aero Squadron. One typed page.