| Regimental number | 34789 |
| Place of birth | Warialda New South Wales |
| Religion | Presbyterian |
| Occupation | Station manager |
| Address | Tirzah, Moree, New South Wales |
| Marital status | Single |
| Age at embarkation | 25 |
| Next of kin | Mother, Mrs Mary W MacMillan, Tirzah, Moree, New South Wales |
| Enlistment date | |
| Rank on enlistment | Gunner |
| Unit name | Field Artillery Brigade, April 1917 Reinforcements |
| AWM Embarkation Roll number | 13/128/1 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A29 Suevic on |
| Rank from Nominal Roll | BSM |
| Unit from Nominal Roll | 2nd Field Artillery Brigade |
| Fate | Returned to Australia |
| Medals |
Military Medal Source: 'Commonwealth Gazette' No. 115 Date: |
| Family/military connections | Brother: Captain Norman Scott MACMILLAN, 1st Machine Gun Squadron, returned to Australia, 16 May 1919; Cousin: 855 Sergeant James VROLAND, 23rd Bn, killed in action, 29 November 1915. |
| Other details |
War service: Western Front Medals: Military Medal, British War Medal, Victory Medal |