| Date of enlistment | 13th July 1915 |
| Rank at enlistment | Acting Corporal |
| Company | Transferred to 2nd Pioneer Battalion |
| Significant events while with the AIF | Hospitalised sick on three occasions – incl trench feet |
Summary of Acting Corporal Seddon’s WW1 service record, located in the National Archives of Australia. Full details are available online, NAA Series B2455
| Date | Location | Event |
| 27th July 1917 | Australia | Discharged – medically unfit |
| 9th June 1917 | Australia | Disembarked HT Barambah |
| 18th April 1917 | England | Return to Australia on HT Barambah |
| 8th April 1917 | England | Discharged from hospital |
| 14th March 1917 | England | Admitted to 1st Auxiliary Hospital – haemoptysis |
| 8th February 1917 | England | Admitted to Beaufort Bristol War Hospital |
| 7th February 1917 | France | Embarked on HS St.Patrick for England |
| 18th December 1916 | France | Admitted to hospital from Flers – trench feet |
| 26th June 1916 | France | Falling out of march without permission – forfeit of 1 days pay |
| 26th March 1916 | France | Disembarked Marseille |
| 19th March 1916 | Egypt | Proceeded to join British Expeditionary Force from Alexandria on the Llandovery Castle |
| 11th March 1916 | Egypt | Transferred to 2nd Pioneers and Taken on Strength |
| 28th February 1916 | Egypt | Discharged from Helouan hospital and to duty |
| 6th January 1916 | Egypt | Admitted to hospital sick – influenza |
| 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