The British Expeditionary Force order of battle 1914, as originally despatched to France in August and September 1914, at the beginning of World War I. The British Army prior to World War I traced its origins to the increasing demands of imperial expansion together with inefficiencies highlighted during the Crimean War, which led to the Cardwell and Childers Reforms of the late 19th century. These gave the British Army its modern shape, and defined its regimental system. The Haldane Reforms of 1907 formally created an Expeditionary force and the Territorial Force.