| Regimental number | 735 |
| Place of birth | Queenstown, Co Cork, Ireland |
| School | Queenstown and Mallard Schools, Co Cork, Ireland |
| Age on arrival in Australia | 18 |
| Religion | Presbyterian |
| Occupation | Hardware assistant |
| Marital status | Single |
| Age at embarkation | 22 |
| Height | 5' 10" |
| Weight | 154 lbs |
| Next of kin | John O'Brien McNeill, 13 Diamond Street, Londonderry, Ireland |
| Previous military service | Nil |
| Enlistment date | |
| Date of enlistment from Nominal Roll | |
| Place of enlistment | Blackboy Hill, Western Australia |
| Rank on enlistment | Private |
| Unit name | 10th Light Horse Regiment, 2nd Reinforcement |
| AWM Embarkation Roll number | 10/15/2 |
| Embarkation details | Unit embarked from Fremantle, Western Australia, on board HMAT A50 Itonus on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 10th Light Horse Regiment |
| Fate | Killed in Action |
| Place of death or wounding | Walker's Ridge, Gallipoli, Turkey |
| Age at death from cemetery records | 19 |
| Place of burial | Ari Burnu Cemetery (Row E, Grave No. 21), Gallipoli, Turkey |
| Panel number, Roll of Honour, Australian War Memorial | 8 |
| Miscellaneous information from cemetery records | Parents: John O'Brien and Eleanor McNEILL, 24 Wesley Street, Londonderry, Ireland. Native of Queenstown, Ireland |
| Family/military connections | Brothers: Charles Simpson O'BRIEN MM; John Elder O'BRIEN DCM, both British Army; Cousins:85 Sergeant Henry Joseph O'BRIEN, 3rd Machine Gun Bn, killed in action, 29 September 1918; 240 Pte Leslie Glenmore O'BRIEN MM, 4th Machine Gun Bn, died of wounds, 2 September 1918; 2457 Pte Harold O'BRIEN, 5th Machine Gun Bn, effective abroad (still overseas). |
| Other details |
War service: Egypt, Gallipoli Embarked Alexandria for Gallipoli, 16 May 1915. Killed in action, Walker's Ridge, Gallipoli, 7 August 1915. Medals: 1914-15 Star, British War Medal, Victory Medal |
| Sources | NAA: B2455, McNEILL Henry George |
Postal Address:
Po Box 7916
Canberra BC 2610, Australia
Street Address:
Northcott Drive,
Campbell, ACT 2600
