| Regimental number | 1534 |
| Place of birth | Bridgetown, Western Australia |
| Religion | Church of England |
| Occupation | Farmer |
| Address | Greenbushes, Western Australia |
| Marital status | Single |
| Age at embarkation | 24 |
| Next of kin | Father, Lindsay Richard Armstrong, Greenbushes, Western Australia |
| Enlistment date | 23 August 1915 |
| Rank on enlistment | Private |
| Unit name | 10th Light Horse Regiment, 12th Reinforcement |
| AWM Embarkation Roll number | 10/15/2 |
| Embarkation details | Unit embarked from Fremantle, Western Australia, on board HMAT RMS Mongolia on 22 November 1915 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 10th Light Horse Regiment |
| Fate | Returned to Australia 10 July 1919 |
| Family/military connections | Brother: 2799 Pte Roy Bunbury ARMSTRONG, died of disease, 30 October 1918; 2800 Pte Ernest Richard ARMSTRONG, 4th Imperial Camel Corps, returned to Australia, 27 July 1919. |