"The Military Book of the General Staff of the German Army "Customs of War on Land", published by the Great General Staff of the German Army" is an extremely valuable document that sheds light on the tactics and methods of warfare by the German troops. The authors of this book are the staff of the Kriegsgeschichtliche Abteilung II Groser of the General Staff of Prussia (Germany), who have researched military history and the development of strategies over many years. This book is not only a study of the military aspects, but also an important source for the study of the military history of Europe, in particular Germany, in the period after the Prussian wars and before the First World War. Detailed analyzes of tactics, strategies, and lessons learned in previous wars make this book an integral part of understanding military conflicts of the past.