| Regimental number | 1402 |
| Place of birth | N/A South Australia |
| Religion | Methodist |
| Occupation | Labourer |
| Address | Willunga, South Australia |
| Marital status | Single |
| Age at embarkation | 22 |
| Next of kin | Father, C Mills, Willunga, South Australia |
| Enlistment date | 29 October 1914 |
| Rank on enlistment | Private |
| Unit name | 3rd Battalion, 2nd Reinforcement |
| AWM Embarkation Roll number | 23/20/2 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A48 Seang Bee on 11 February 1915 |
| Rank from Nominal Roll | Private |
| Family/military connections | Brothers: 3217 Pte Arthur Bruce MILLS, 50th Bn, killed in action, 16 August 1916; 55861 Pte Wilfred Samuel MILLS, 43rd Bn, returned to Australia, 22 July 1919. |