The Canadian Expeditionary Force (CEF) was formed during World War I to serve as Canada's military contribution to the conflict. Established in 1914, the CEF consisted of volunteers who enlisted to fight overseas. It played a significant role in several key battles, including the Battle of Vimy Ridge and the Battle of Passchendaele, showcasing the bravery and effectiveness of Canadian soldiers. The CEF was disbanded in 1920 after the war ended, but its legacy continues to influence Canada's military identity. The experiences of the CEF helped shape the future of the Canadian Armed Forces and fostered a sense of national pride among Canadians.