Which war did Canada participate in as a part of the British Empire?

Canada's participation in World War I is a significant historical event that reflects its role within the British Empire during that time. When the war began in 1914, Canada declared war on Germany as part of its obligations to Britain. At that point, Canada was still a dominion within the British Empire, meaning that its foreign policy was largely aligned with British interests.

During World War I, Canadian forces played a crucial role in several key battles, such as the Battle of Vimy Ridge, which is often viewed as a pivotal moment in Canadian history. This war not only showcased Canada's military capabilities but also fostered a sense of national identity and pride among Canadians, separate from its colonial ties.

The other wars listed, while involving Canada, occurred after it had already gained greater autonomy from Britain. In World War II, although Canada again fought alongside Britain, it was recognized as a more independent participant. The Korean War and the Vietnam War also saw Canadian involvement but were part of international efforts outside the direct command of the British Empire. Thus, while Canadian troops fought in all these conflicts, World War I is particularly tied to its participation under the auspices of the British Empire.