The Colonial Front: The War in the Colonies
Britain's approach to colonial policy was very hands-off. As opposed to their French allies, who took direct control over sourcing manpower from their colonies, the British saw fit to leave recruitment of men and sourcing of resources to each individual colony and dominion. This was likely a testament to their gargantuan size, despite the advancements in communications brought on by the Second Industrial Revolution.
The Dominions had a little more freedom than their counterparts in the crown colonies. While their foreign policy was still deeply tied to that of their metropole, they saw more freedom in recruitment and chain of command. They were allowed to have their own officers and fight on equal footing with their European counterparts.
Your King and Country need you - Diary of a Canadian
A piece of reading for the average soldier. Directed to Canadians contributing to the war effort, there is an appeal to duty. "Your King and Country" are front and centre, pulling most of your attention to that part of the page, evoking the importance of the phrase. "La vie canadienne" can be observed at the top end of the pages, however it is unclear if it is really meant to be read by French Canadians, who never had french material to be read provided by the government.
Ricochet by the Sniper - Travels of the H.M.T "Canada"
Here is shown a journal directed towards Canadian soldiers participating during the Battle of Passchendaele. Many soldiers from the colonies participated in this major battle during the war, Canada, Australia, and New Zealand included. According to Birtwiste Wiki, the HMT Canada's only troop transportation mission during the First World War was from the 1st to the 7th of June 1916, from Alexandria to Marseilles. With this in mind, it is safe to assume that this is the voyage the journal is documenting. It is important for troops very far from home to have something to relate to, and for High Command as well as it helps greatly with morale. Britain employed this to a great degree during the war and it played a vital role in the sourcing of manpower.