| Regimental number | 655 |
| Religion | Roman Catholic |
| Occupation | Labourer |
| Address | Korong Vale, Victoria |
| Marital status | Single |
| Age at embarkation | 22 |
| Next of kin | Father, David O'Brien, Korong Vale, Victoria |
| Enlistment date | |
| Date of enlistment from Nominal Roll | |
| Rank on enlistment | Private |
| Unit name | 13th Light Horse Regiment, 1st Reinforcement |
| AWM Embarkation Roll number | 10/18/2 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A40 Ceramic on |
| Regimental number from Nominal Roll | 655A |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 39th Battalion |
| Recommendations (Medals and Awards) |
Military Medal 'Work at Suzanne on 25 August 1918.' Recommendation date: Mention in Despatches Recommendation date: |
| Fate | Returned to Australia |
| Family/military connections | Brothers: 2367 Pte Ronald Ewan O'BRIEN, 8th Bn, killed in action, 20 September 1917; 163 Lance Corporal Dougald O'BRIEN 1st Field Squadron Engineers, Anzac Mounted Division, died of disease, 7 November 1918. |
| Other details |
Medals: 1914-15 Star, British War Medal, Victory Medal |
Postal Address:
Po Box 7916
Canberra BC 2610, Australia
Street Address:
Northcott Drive,
Campbell, ACT 2600
