
| Date of birth | |
| Other Names | O'HALLORAN, Charles Michael~ |
| Religion | Roman Catholic |
| Occupation | Medical practitioner |
| Address | Enmore, New South Wales |
| Marital status | Married |
| Age at embarkation | 33 |
| Next of kin | Wife, Mrs J O'Halloran, 'Eileen', Glen Innes, New South Wales |
| Enlistment date | |
| Date of enlistment from Nominal Roll | |
| Rank on enlistment | Captain |
| Unit name | Medical Officers |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A4 Pera on |
| Rank from Nominal Roll | Major |
| Unit from Nominal Roll | Australian Army Medical Corps |
| Promotions |
Captain Unit: No 2 Australian General Hospital Promotion date: Major Unit: 5th Light Horse Field Ambulance Promotion date: |
| Fate | Returned to Australia |
| Other details |
Medals: 1914-15 Star, British War Medal, Victory Medal |