| Regimental number | 2443 |
| Place of birth | County Kerry, Ireland |
| Religion | Roman Catholic |
| Occupation | Carpenter and joiner |
| Address | Brisbane, Queensland |
| Marital status | Single |
| Age at embarkation | 24 |
| Height | 5' 9.5" |
| Weight | 130 lbs |
| Next of kin | Father, James O'Brien, 72 Boherbee, Tralee, County Kerry, Ireland |
| Previous military service | Nil |
| Enlistment date | |
| Place of enlistment | Enoggera, Queensland |
| Rank on enlistment | Private |
| Unit name | 4th Pioneer Battalion, Reinforcement 4 |
| AWM Embarkation Roll number | 14/16/3 |
| Embarkation details | Unit embarked from Brisbane, Queensland, on board HMAT A50 Itonus on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 4th Pioneer Battalion |
| Fate | Returned to Australia |
| Miscellaneous information from cemetery records | Parents: James and Diana O'BRIEN. Plaque in Queensland Garden of Remembrance. |
| Discharge date | |
| Other details |
War service: England. Embarked Brisbane, 8 August 1916; disembarked Plymouth, England, 18 October 1916. Marched into Australian Details, No 3 Camp, Parkhouse, 3 November 1916. Marched out of No 3 Camp to Pioneer Training Bn, Perham Downs, 9 November 1916. Marched out No 4 Company, Pioneer Training Bn, to No 6 Company, 22 February 1917. Classified C3 due to recurrent bronchitis, fibrosis, probably of tuberoulous origin and poor physique, 2 March 1917. Marched into No 2 Command Depot, Weymouth, 5 March 1917. Marched out of No 2 Command Depot, 6 April 1917. Commenced return to Australia from Devonport on board HT 'Themistocles', 9 May 1917; disembarked Sydney, 4 July 1917; discharged Brisbane (medically unfit), 8 August 1917. Medal: British War Medal. |
| Date of death | |
| Age at death | 35 |
| Place of burial | Toowong Cemetery, Queensland |
| Sources | NAA: B2455, O'BRIEN Michael James |
Postal Address:
Po Box 7916
Canberra BC 2610, Australia
Street Address:
Northcott Drive,
Campbell, ACT 2600
