The Canadian National Vimy Memorial is a war memorial site in France dedicated to the memory of Canadian Expeditionary Force members killed during the First World War. The Battle of Vimy Ridge was the first time all four divisions of the Canadian Expeditionary Force participated in a battle as a cohesive formation, and it became a Canadian national symbol of achievement and sacrifice. Wartime tunnels, trenches, craters, and unexploded munitions still honeycomb the grounds of the site.