| Date of enlistment | 21st July 1915 |
| Rank at enlistment | Acting Sergeant |
| Company | |
| Significant events while with the AIF | Hospitalised sick |
Summary of Acting Sergeant Yarrow’s WW1 service record, located in the National Archives of Australia. Full details are available online, NAA Series B2455
| Date | Location | Event |
| 3rd July 1916 | Australia | Discharged |
| 13th March 1916 | Australia | Disembarked Nestor |
| 9th February 1916 | Egypt | Returned to Australia on HT Nestor |
| 9th January 1916 | Egypt | To hospital sick – tachycardia |
| 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 |
| 16th August 1915 | Australia | Assigned to 5th Reinforcements 22nd Battalion |
| 26th July 1915 | Australia | Appointed Acting Sergeant |
| 19th July 1915 | Australia | Marched into Broadmeadows depot |
FIRST WORLD WAR TIMELINE 
Following the Twenty-Second 