| Regimental number | 18194 |
| Place of birth | Brisbane Queensland |
| Religion | Roman Catholic |
| Occupation | Carpenter |
| Address | Warwick, Queensland |
| Marital status | Single |
| Age at embarkation | 33 |
| Next of kin | Brother, James Callaghan, Albion Street, Warwick, Queensland |
| Enlistment date | 7 October 1916 |
| Rank on enlistment | Sapper |
| Unit name | April 1917 Reinforcements |
| AWM Embarkation Roll number | 14/42/3 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A28 Miltiades on 2 August 1917 |
| Rank from Nominal Roll | Sapper |
| Unit from Nominal Roll | 13th Field Company Engineers |
| Fate | Returned to Australia 15 June 1919 |
| Miscellaneous details (Nominal Roll) | *Spelt Leslie Lenord Callaghan on NR |