The Canadian Expeditionary Force was the designation of the field force created by Canada for service overseas in the First World War. The force fielded several combat formations in France and Flanders, the largest of which was the Canadian Corps, consisting of four divisions. The Canadian Cavalry Brigade and the Canadian Independent Force, which were independent of the Canadian Corps, also fought on the Western Front. The CEF also had a large reserve and training organization in England, and a recruiting organization in Canada. In the later stages of the European war, particularly after their success at Vimy Ridge and Passchendaele, the Canadian Corps was regarded by friend and foe alike as the most effective Allied military formation on the Western Front. The Germans went so far as to ca