The battalion was authorized on 10 July 1915 and embarked for Great Britain on 18 June 1916.
There, on 30 June 1916, its personnel were absorbed by the 73rd Battalion (Royal Highlanders of Canada), CEF, 75th Battalion (Mississauga), CEF and other units of the 4th Canadian Division, to provide reinforcements for the Canadian Corps in the field.
[1] The 84th Battalion recruited and was mobilized in Toronto, Ontario.
[2] The 84th Battalion was awarded the battle honour THE GREAT WAR 1916.
[2] The 84th Battalion, CEF is perpetuated by The Toronto Scottish Regiment (Queen Elizabeth The Queen Mother's Own).