|Place of birth||County Kerry, Ireland|
|Occupation||Carpenter and joiner|
|Age at embarkation||24|
|Next of kin||Father, James O'Brien, 72 Boherbee, Tralee, County Kerry, Ireland|
|Previous military service||Nil|
|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|
|Parents: James and Diana O'BRIEN. Plaque in Queensland Garden of Remembrance.|
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|