| Regimental number | 2518 |
| Place of birth | Wyalong New South Wales |
| Religion | Roman Catholic |
| Occupation | Labourer |
| Address | Forbes, New South Wales |
| Marital status | Single |
| Age at embarkation | 19 |
| Next of kin | Father, Thomas Gillan Byrnes, Forbes PO, Forbes, New South Wales |
| Enlistment date | 11 April 1916 |
| Rank on enlistment | Private |
| Unit name | 45th Battalion, 5th Reinforcement |
| AWM Embarkation Roll number | 23/62/3 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A68 Anchises on 24 August 1916 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 45th Battalion |
| Fate | Returned to Australia 10 September 1917 |
| Miscellaneous details (Nominal Roll) | *Given name Peter John |
| Date of death | 25 March 1963 |
| Place of burial | Botany Cemetery |
