Preface; Introduction; Basic Statistics; The Main Aircraft Types Used by the Protagonists in Alphabetical Sequence; Further Aircraft Statistics for France, Great Britain and Germany; The End of the War on the German Side; The Scope of Coverage and the Methods used in this Book; The United Kingdom of Great Britain and Ireland, Dominions and Empire; Aircraft flown by the RFC during the First World War; RFC and RAF First World War Aces and Airmen; The Invaluable Services of Dominion Forces; Canada; Australia; New Zealand; South Africa; The French Military Air Service: Aeronautique Militaire; French Aircraft of the First World War; The French Aces and Airmen; The United States Air Service 1916-1918; United States Aces; Italy: Aeronautica de Regio Esercito; Italian Aircraft of the First World War; Italian Aces; Belgium: Belgian Air Arm: Compagnie des Aviateurs: Aviation Militaire; Belgian Aces; Imperial Russian Air Service; Russian Aces and Airmen; Imperial German Air Service: Luftstreitkrafte; German Aces and Airmen; The Austro-Hungarian Empire: Naval Air Service: Luftahrtruppen; Austro-Hungarian Aces; The Lesser Military Air Services of the First World War; Appendix: The Royal Aircraft Factory.