Intermarium is a geostrategic project to unite the states of Eastern Europe under Polish leadership, which was proposed a hundred years ago by Marshal Jozef Pilsudski. Then his plans ended in failure, but the chimeras of Intermarium still continue to disturb the minds of Polish politicians and wreak havoc in the East of Europe. Just like a hundred years ago, Warsaw today is again trying to unite the region and contrast it with Russia and Western Europe. Against the backdrop of growing strategic alienation between the United States and the EU, Intermarium is gradually becoming Washington’s main weapon against the European Union and Russia. The authors of the collection - well-known historians, political scientists and international affairs specialists - analyze in detail and meaningfully the history and current stage of Poland's struggle for regional dominance. The book is intended for a wide range of readers interested in European history and current international politics.