The book "The History of the Great War. Volume 6. The History of the European War from Official Sources" is the sixth volume of a voluminous series revealing the events of the First World War. In this book, the author, using official documents, describes in detail the events that took place in Europe during the war. The reader will learn about military operations, battles, strategic decisions and diplomatic negotiations that determined the fate not only of individual countries, but also of the whole world. This book is a valuable source of knowledge about the history of that period and extremely important for understanding the events that shaped the world political picture.