Colonel Nicholson's Canadian Expeditionary Force 1914-1919, is the primary printed source, and the Official History, of the Canadian Army's involvement in the First World War.Immediately after the war a first attempt to write an official history was undertaken, but the ill-fated project produced only one volume. Some forty years later Colonel Nicholson, an established military historian, was commissioned to write a single volume, authentic, Official History for the Canadian part in the First World War, it was designed to meet the needs of the student of military history, the author was given full access to official documents. Illustrated with numerous photographs and full-colour battle maps, Nicholson's text offers a trusted account of the war effort, while also discussing politics on the home front, including debates around conscription in 1917. This is a worthy memorial to Canada's first great expeditionary force.