| Regimental number | 3683 |
| Date of birth | |
| Place of birth | Yass, New South Wales |
| School | Christian Brothers (Catholic), Wagga Wagga, New South Wales |
| Religion | Roman Catholic |
| Occupation | Assistant mechanic |
| Address | Collins Street, Wagga Wagga, New South Wales |
| Marital status | Single |
| Age at embarkation | 18 |
| Next of kin | Father, C Beckett Armstrong, Collins Street, Wagga Wagga, New South Wales |
| Previous military service | Four years of Military Service in 44 B area. |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 4th Battalion, 12th Reinforcement |
| AWM Embarkation Roll number | 23/21/3 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A7 Medic on |
| Rank from Nominal Roll | Lance Corporal |
| Unit from Nominal Roll | 4th Machine Gun Battalion |
| Other details from Roll of Honour Circular | Died of influenza, Maubergh, France (47th Casualty Clearing Station) |
| Fate | Died of disease |
| Place of death or wounding | France |
| Age at death | 21.6 |
| Age at death from cemetery records | 21 |
| Place of burial | Maubeuge-Centre Cemetery (Row B, Grave No. 37), France |
| Panel number, Roll of Honour, Australian War Memorial | 176 |
| Miscellaneous information from cemetery records | Parents: Colbille and Mena ARMSTRONG, Colins Street, Wagga Wagga, New South Wales. Commemorated in Wagga Wagga Monumental Cemetery, New South Wales.~ |
| Family/military connections | Two cousins, one died of wounds, the other was killed. |