I have a new series of data concerning the casualty of the First World War that were suffered by the United Kingdom on a monthly basis from August 1914 to November 1918. All though unrelated with economics per se, I often see military history be approached without any graphs or data (with the notable exception of the “Wages of Destruction” by Adam Tooze and the Statistical Handbook of World War II). I believe that collecting such data is quite useful for the purposes of the study of military history and I hope that some military historians will find them useful.