| Regimental number | 4264 |
| Religion | Church of England |
| Occupation | Labourer |
| Address | Allendale Post Office, Victoria |
| Marital status | Single |
| Age at embarkation | 21 |
| Next of kin | Father, O McMillan, Allendale Post Office, Allendale, Victoria |
| Enlistment date | 27 July 1915 |
| Date of enlistment from Nominal Roll | "nonr" |
| Rank on enlistment | Private |
| Unit name | 14th Battalion, 13th Reinforcement |
| AWM Embarkation Roll number | 23/31/4 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A64 Demosthenes on 29 December 1915 |
| Miscellaneous details | Cemetery Details state No. 4264 as Henry Alexander MACMILLAN |
