| Regimental number | 2575 |
| Place of birth | Adelaide, South Australia |
| Religion | Church of England |
| Occupation | Labourer |
| Address | Romford Street, Hindmarsh, South Australia |
| Marital status | Single |
| Age at embarkation | 19 |
| Next of kin | Father, William Byrne, Woodbridge Hotel, East Guildford, Western Australia |
| Enlistment date | 4 January 1916 |
| Rank on enlistment | Private |
| Unit name | 32nd Battalion, 5th Reinforcement |
| AWM Embarkation Roll number | 23/49/2 |
| Embarkation details | Unit embarked from Adelaide, South Australia, on board HMAT A9 Shropshire on 25 March 1916 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 18th Battalion |
| Fate | Returned to Australia 22 May 1919 |
| Miscellaneous details (Nominal Roll) | *Allen spelt Alan |
