Documents and materials on the history of Soviet-Polish relations . Volume IV. April 1921 . May 1926 . prepared by a team of authors, represents a unique and valuable source for those who seek to understand the complex and multifaceted relations between the Soviet Union and the Second Republic of Poland during the interwar period. This work is not just a collection of documents , A thorough historical analysis , Revealing the intricacies of diplomatic negotiations , Domestic Policy and Inter-State Conflicts , which shaped the fate of the two countries in the first years after the end of the Civil War and the establishment of Soviet power This volume covers the period from April 1921 to May 1926 - a time when relations between the USSR and Poland were on the verge of change, and diplomatic initiatives and confrontations became key factors of regional security. The book presents original documents, transcripts, protocols of negotiations and internal reports that allow the reader to follow the course of events, understand the motives of the parties and see how the foundations of future relations were formed. Special attention is paid to the issues of borders, Polish-Soviet treaties, as well as internal political changes in both countries, which makes the book a valuable source for historians, political scientists and anyone interested in the history of Eastern Europe. This book is ideal for students, researchers and professionals engaged in the history of the 20th century, as well as for a wide range of readers interested in the history of interstate relations, diplomacy and political strategy. It will be interesting for those who are looking for a deep understanding of the causes and consequences of the events preceding the Second World War, as well as for those who want to trace the development of Soviet-Polish relations using the example of specific documents and historical facts. The special advantage of this publication is its authenticity and scientific accuracy .. The team of authors, who collected and systematized the materials, used archival sources previously inaccessible to the general public, which makes the book unique in its kind. The style of presentation combines the rigor of scientific analysis and vividness of description, which allows not only to gain valuable knowledge, but also to plunge into the atmosphere of the era, to feel the tension of diplomatic games and strategic decisions. The author’s team, including leading experts on the history of the Soviet Union and Poland, is distinguished by high professionalism and deep knowledge of the topic. Their works, such as “History of Soviet-Polish Relations” and “Diplomacy in the Age of Interwar Conflicts”, have earned recognition for their accuracy and analytical depth. In this context, "Documents and materials on the history of Soviet-Polish relations . Volume IV" becomes a logical continuation of research that reveals the complex mechanisms of interaction between the two states. Documents and materials on the history of Soviet-Polish relations . Volume IV. April 1921 . May 1926 . This is not only a source of facts, but also a window into an era when the fate of peoples was decided behind closed doors of diplomatic offices. It has a well-deserved place in the libraries of historians and all those who want to understand how borders, policies and ideas were formed that determined the future of Europe. This edition is a must-read for those who appreciate in-depth analysis, documentary accuracy and historical truth, because it is such books that help to understand the causes and consequences of events that still affect modern geopolitics. If you are looking for a book that combines a wealth of archival material and analytical depth, "Documents and Materials on the History of Soviet-Polish Relations. Volume IV" will be the most valuable acquisition for you. This is not just a collection of documents - it is the key to understanding complex interstate relations, which will open new horizons in the study of the history of Eastern Europe and will help to form an objective idea of the most important events of the 20th century.