The monograph in a popular science form, using a wide range of sources, investigated the key stages of the Soviet-Polish military confrontation of 1918-1920. Based on a comprehensive analysis of the causes, course and results of the Soviet-Polish war of 1920, the features of conducting an armed struggle in this period were identified, lessons and conclusions were formulated. The book is intended for a wide range of readers and primarily for those who are interested in military history.