| Service number | 443 |
|---|---|
| Ranks Held | Private, Trooper |
| Birth Date | 1885 |
| Birth Place | Australia: New South Wales, Sydney, Paddington |
| Death Date | 1915-07-12 |
| Death Place | Ottoman Empire: Turkey, Marmara, Gallipoli Peninsula |
| Final Rank | Trooper |
| Service | Australian Imperial Force |
| Units |
|
| Places | |
| Conflict/Operation | First World War, 1914-1918 |
Trooper William Harold O'Brien
Rolls
-
First World War Nominal Roll:
- Unit
- 2nd Australian Light Horse Regiment
- Conflict
- First World War, 1914-1918
- Rank
- Private
-
First World War Embarkation Roll:
- Conflict
- First World War, 1914-1918
- Rank
- Private
-
Roll of Honour:
- Unit
- 6th Australian Light Horse Regiment
- Conflict
- First World War, 1914-1918
- Rank
- Trooper
Timeline
| Date of birth | 1885 | |
|---|---|---|
| Date of enlistment | 26 September 1914 | |
| Date of embarkation | 21 December 1914 | |
| Date of death | 12 July 1915 | |
| Date of fate | 12 July 1915 |