- Shared cultural heritage: Canada was a dominion of the British Empire and had strong ties to Britain in terms of language, culture, and history. Many Canadians felt a sense of loyalty to the British crown and felt it was their duty to support Britain during wartime.
- Economic interdependence: Canada and Britain had close economic ties, and Canada was a major supplier of raw materials and food to Britain. Canada's economy was also dependent on British investment, and many Canadians feared that a British defeat would have negative economic consequences for the country.
- Political allegiance: Canada was still under British rule during World War I and was officially part of the Allied Powers. The Canadian government, therefore, had a political obligation to support Britain and the other Allies.
- Sense of duty: Many Canadians believed that it was their duty to defend the British Empire and its values, such as democracy and freedom. This sense of duty was reinforced by the widespread propaganda and patriotism that was prevalent during both world wars.
- Recruitment and voluntary service: Many Canadians were motivated to join the military by a sense of adventure, patriotism, or the desire to serve their country. The British government also actively recruited Canadians for its armed forces, and many Canadians were eager to enlist in order to fight alongside their British comrades.
- Conscription: In World War I, Canada introduced mandatory military service, or conscription, in order to increase the number of troops available for the war effort. This led to significant resistance and protests in some parts of Canada, but it also ensured that Canada was able to provide significant military support to Britain and the Allies.