| Regimental number | R535 |
| Religion | Roman Catholic |
| Occupation | Farmer |
| Address | Glenormiston, Terang, Victoria |
| Marital status | Single |
| Age at embarkation | 24 |
| Next of kin | Father, George Sadler, Glenormiston, Terang, Victoria |
| Enlistment date | |
| Date of enlistment from Nominal Roll | |
| Rank on enlistment | Private |
| Unit name | 24th Battalion, 13th Reinforcement |
| AWM Embarkation Roll number | 23/41/4 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A32 Themistocles on |
| Regimental number from Nominal Roll | 535 |
| Rank from Nominal Roll | Lance Corporal |
| Unit from Nominal Roll | 24th Battalion |
| Fate | Killed in Action |
| Other details |
War service: Western Front Embarked Melbourne, 28 July 1916, on board HT 'Themistocles', with 24th Bn, 13th Reinforcements; disembarked Plymouth, England, 11 September 1916. Proceeded overseas to France, 16 November 1916; taken on strength, 24th Bn, in the field, 9 January 1917. Appointed Lance corporal, 18 March 1917. Killed in action, 4 May 1917. Medals: 1914-15 Star, British War Medal, Victory Medal |
| Sources | NAA: B2455, SADLER John William |