The book is dedicated to the Brest Treaty, concluded 9.02.1918 between the UPR and the states of the Fourth Union (Germany, Austria-Hungary, Bulgaria and Turkey). In the work, the author wants to highlight the historical memory of Ukrainians about the times and events in which the Ukrainian people entered the historical arena as a subject of international politics in the development of their own state. The book will be useful for history students, everyone who is interested in the history of Ukraine.