| Date of enlistment | 12th July 1915 |
| Rank at enlistment | Private |
| Company | Transferred to 2nd Pioneer Battalion |
| Significant events while with the AIF | Appointed Lance Corporal (later reverted to ranks at own request)
Went through to the end without becoming a casualty |
Summary of Private Thirlwell’s WW1 service record, located in the National Archives of Australia. Full details are available online, NAA Series B2455
| Date | Location | Event |
| 22nd July 1919 | Australia | Discharged |
| 30th May 1919 | Australia | Disembarked Castilla |
| 13th April 1919 | England | Return to Australia on Castilla from Devonport |
| 12th February 1919 | France | Marched out of AIBD to England |
| 3rd April 1918 | France | Re-joined Unit |
| 17th March 1918 | England | To England and leave |
| 11th July 1917 | France | Revert to Ranks on own request |
| 11th June 1917 | France | Re-joined Unit |
| 8th June 1917 | France | Attending 2nd Australian Division Gas School |
| 9th May 1917 | France | Appointed Lance Corporal |
| 26th March 1916 | France | Disembarked Marseille |
| 19th March 1916 | Egypt | Proceeded to join British Expeditionary Force from Alexandria on the Llandovery Castle |
| 16th March 1916 | Egypt | Transferred to and Taken on Strength to 2nd Pioneer Battalion, Moascar |
| 8th January 1916 | Egypt | Taken on Strength, Tel-el-Kabir |
| 25th October 1915 | Egypt | Disembarked Alexandria |
| 29th September 1915 | Australia | Departed Melbourne on RMS Osterley |
| 3rd August 1915 | Australia | Assigned to 5th Reinforcements 22nd Battalion |
| 19th July 1915 | Australia | Marched into Broadmeadows depot |


FIRST WORLD WAR TIMELINE