| Regimental number | 3409 |
| Other Names | BARKER, Reginald Thomas George |
| Religion | Church of England |
| Occupation | Hairdresser |
| Address | Unwin's Bridge Road, Undercliffe, Sydney, New South Wales |
| Marital status | Single |
| Age at embarkation | 19 |
| Next of kin | Father, George L Barker, Unwin's Bridge Road, Undercliffe, Sydney, New South Wales |
| Enlistment date | 12 April 1917 |
| Date of enlistment from Nominal Roll | 12 May 1917 |
| Unit name | 7th Light Horse Regiment, 29th Reinforcement |
| AWM Embarkation Roll number | 10/12/5 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A55 Kyarra on 3 September 1917 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 7th Light Horse Regiment |
| Fate | Returned to Australia 28 June 1919 |