About the book: 2021 / The second volume of the publication, dedicated to the study of the history of Ukrainian-Russian relations, chronologically covers events from the end of 1918 to January 1924. The content of complex multidirectional processes, to a decisive extent predetermined by the difference in the social nature of Ukrainian state entities - the Ukrainian People's Republic and the Ukrainian Socialist Soviet Republic. The essence and results of the unification movement for the creation of the Union of Soviet Socialist Republics are revealed, and an assessment of the historical phenomenon is given. The publishing layout of the book is saved in PDF A4 format.