| Ranks Held | Major, Second Lieutenant |
|---|---|
| Final Rank | Major |
| Unit | 6th Australian Light Horse Regiment |
| Conflict/Operation | First World War, 1914-1918 |
Major Harold Ormond O'Brien
Collection items
Rolls
-
Honours and Awards (Recommendation):
- Unit
- 7th Australian Light Horse Regiment
- Conflict
- First World War, 1914-1918
- Rank
- Major
-
Honours and Awards (Recommendation):
- Unit
- 6th Australian Light Horse Regiment
- Conflict
- First World War, 1914-1918
- Rank
- Major
-
First World War Nominal Roll:
- Unit
- 6th Australian Light Horse Regiment
- Conflict
- First World War, 1914-1918
- Rank
- Major
-
First World War Embarkation Roll:
- Conflict
- First World War, 1914-1918
- Rank
- Second Lieutenant
Timeline
| Date of enlistment | 09 October 1914 | |
|---|---|---|
| Date of embarkation | 21 December 1914 | |
| Date of recommendation honour or award | 27 March 1918 | |
| Date of recommendation honour or award | 03 April 1918 | |
| Date returned to Australia | 03 August 1918 |