| Regimental number | 1984 |
| Place of birth | Melbourne Victoria |
| Religion | Church of England |
| Occupation | Labourer |
| Address | Baker's Hill, Western Australia |
| Marital status | Single |
| Age at embarkation | 22 |
| Next of kin | Mother, Mrs Elizabeth Oyston, Baker's Hill, Western Australia |
| Enlistment date | 29 February 1916 |
| Rank on enlistment | Private |
| Unit name | 51st Battalion, 3rd Reinforcement |
| AWM Embarkation Roll number | 23/68/3 |
| Embarkation details | Unit embarked from Fremantle, Western Australia, on board HMAT A48 Seang Bee on 18 July 1916 |
| Rank from Nominal Roll | Lance Corporal |
| Unit from Nominal Roll | 51st Battalion |
| Fate | Returned to Australia 21 June 1919 |
| Family/military connections | Brother: 6312 Pte Francis John McMillan OYSTON, 32nd Bn, killed in action, 29 September 1917. |
