Source: Appendix 2, June 1917 War Diary: Referenced regarding a tug-of-war. Not confirmed that this is the soldier in text.
Find-A-Grave
Family Search: When Sergeant Harry Arthur Green was born on 11 May 1888, in Birmingham, West Midlands, England, United Kingdom, his father, Joseph Coltman Green, was 41 and his mother, Alice Eleanor Palmer, was 35. He married May Lucas in May 1915, in Aston, Warwickshire, England, United Kingdom. They were the parents of at least 1 daughter. He immigrated to Canada in 1913 and lived in Aston Manor, Warwickshire, England, United Kingdom in 1901 and Erdington, Warwickshire, England, United Kingdom in 1911. He registered for military service in 1914. In 1915, at the age of 27, his occupation is listed as farmer. He died in June 1950, in Birmingham, West Midlands, England, United Kingdom, at the age of 62.
Military Medal per London Gazette 31430 dated 03/07/1919.
History of the 18th Battalion CEF, "The Fighting Eighteenth" 