| Regimental number | 26901 |
| Place of birth | Port Augusta, South Australia |
| Religion | Roman Catholic |
| Occupation | Store manager |
| Address | Port Augusta, South Australia |
| Marital status | Single |
| Age at embarkation | 32 |
| Height | 5' 6" |
| Weight | 118 lbs |
| Next of kin | Brother, P J Brett, Iron Knob, South Australia |
| Previous military service | Nil |
| Enlistment date | |
| Place of enlistment | Port Augusta, South Australia |
| Rank on enlistment | Gunner |
| Unit name | Field Artillery Brigade 6, Reinforcement 8 |
| AWM Embarkation Roll number | 13/34/3 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A15 Port Sydney on |
| Rank from Nominal Roll | Driver |
| Unit from Nominal Roll | 2nd Division Ammunition Column |
| Fate | Returned to Australia |
| Miscellaneous information from cemetery records | Plaque in South Australian Garden of Remembrance |
| Discharge date | |
| Other details |
War service: Western Front Commenced return to Australia on board HT 'Karmala', 1 July 1919; discharged (termination of period of enlistment), Adelaide, 29 September 1919. Medals: British War Medal, Victory Medal Death attributed to War Service. |
| Date of death | |
| Sources | NAA: B2455, BRETT William |