An indispensable reference work with the full title of 'The official names of the battles and other engagements fought by the military forces of the British Empire during the Great War 1914-1919 and the Third Afghan War 1919: report of the Battles Nomenclature Committee as approved by the Army'. A unique document in that it is the sole authority for what action has official recognition, under what name it is known and what are its geographical and chronological limits. It covers every theatre of war from the Western Front to China, and provides the framework on which the history of the conflict has been and continues to be written. It was also the basis on which the regiments laid claim to their battle honours.