Originial text in German translated into French by Brevet Battalion Commander Mabille, and translated from the French into English by Captain John B. Murphy. Includes a preface by General Mangin and accompanying historical study by Friedrich M. Kircheisen. Baron von Hausen considered it his duty to write his personal testimony concerning the Third Army under his command. Kircheisen comments that "According to the most authoritative sources, the Battle of the Marne can not be considered as a strategic defeat for the Germans. It should be regarded rather as a battle lost by us on account of tactical reasons."