| Regimental number | 778 |
| Place of birth | Newcastle, New South Wales |
| True Name | PETERSEN, William Jens Peter |
| School | Superior Public School, Hill, Newcastle, New South Wales |
| Religion | Methodist |
| Occupation | Butcher |
| Address | 120 Church Street West, Newcastle, New South Wales |
| Marital status | Single |
| Age at embarkation | 21 |
| Height | 5' 10.5" |
| Weight | 161 lbs |
| Next of kin | Mrs E Petersen, 120 Church Street West, Newcastle, New South Wales |
| Previous military service | Nil |
| Enlistment date | |
| Place of enlistment | Randwick, New South Wales |
| Rank on enlistment | Private |
| Unit name | 2nd Battalion, G Company |
| AWM Embarkation Roll number | 23/19/1 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A23 Suffolk on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 2nd Battalion |
| Fate | Killed in Action |
| Place of death or wounding | Lone Pine, Gallipoli, Turkey |
| Age at death from cemetery records | 21 |
| Place of burial | Lone Pine Cemetery (Special Memorial C.126), Gallipoli, Turkey |
| Panel number, Roll of Honour, Australian War Memorial | 34 |
| Miscellaneous information from cemetery records | Parents: Jens and Hannah PETERSEN, Royal Street, New Lambton, New South Wales. Native of Newcastle, New South Wales |
| Other details |
War service: Egypt, Gallipoli Embarked Alexandria to join the Mediterrean Expeditionary Force (Gallipoli Campaign), 5 April 1915. Reported wounded, 8 August 1915. Now, 15 December 1915, reported killed in action, 8 August 1915; disc recovered by Burial Party, 23 August 1915. Medals: 1914-15 Star, British War Medal, Victory Medal |
| Sources | NAA: B2455, PETERSEN William |