“…The General Annual Report of the British Army 1913-1919(Army Council, 1921, Statistics of Military Effort of the British Empire during the Great War (The War Office, 1922), and Casualties and Medical Statistics of the Great War (Mitchell andSmith, 1931, 1997) are the most widely used official military data sources on British casualties during the First World War (see Urlanis, 1971, and Winter, 1976, 2003 for more details). Reports published by military authorities (including those mentioned above) are incomplete and provide only approximate data (Winter, 1976(Winter, , 2003.…”