The publication offered to readers is intended for all those who are interested in the history of the USSR. This book will open the door to the fascinating world of historical assumptions and hypotheses and will help in independent study of such a complex, eventful history of our country during the Soviet period. A chapter on the decade of the 90s is also included, which is the logical conclusion of the story about the “Red Era.” The publication is equipped with detailed maps, tables, diagrams and illustrations that will make the study of history fascinating and the knowledge gained lasting.