| Regimental number | 28560 |
| Place of birth | Warracknabeal, Victoria |
| Religion | Presbyterian |
| Occupation | Farmer |
| Address | Kellalac, via Murtoa, Victoria |
| Marital status | Single |
| Age at embarkation | 25.3 |
| Height | 5' 5.5" |
| Weight | 145 lbs |
| Next of kin | Father, G P Armstrong, Kellalac, via Murtoa, Victoria |
| Previous military service | Nil (previously rejected for AIF enlistment on account of eyesight) |
| Enlistment date | |
| Place of enlistment | Ballarat, Victoria |
| Rank on enlistment | Driver |
| Unit name | Field Artillery Brigade 6, Reinforcement 10 |
| AWM Embarkation Roll number | 13/34/3 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A38 Ulysses on |
| Rank from Nominal Roll | Driver |
| Unit from Nominal Roll | 1st Divisional Ammunition Column |
| Fate | Returned to Australia |
| Discharge date | |
| Other details |
War service: Western Front Commenced return to Australia on board HT 'Ceramic', 25 January 1919; discharged (termination of period of enlistment), Melbourne, 30 April 1919. Medals: British War Medal, Victory Medal |
| Sources | NAA: B2455, ARMSTRONG William Percy |