Central European states, modeled on the Intermarium concept. In 2016 the Three Seas Initiative held an initial summit meeting in Dubrovnik, Croatia. The Three Seas Initiative has 12 member states along a north–south axis from the Baltic Sea to the Adriatic Sea and the Black Sea: Estonia, Latvia, Lithuania, Poland, Czech Republic, Slovakia, Austria, Hungary, Slovenia, Croatia, Romania, Bulgaria. See also Balkan Pact (1934) Balkan Pact (1953) Baltic Entente British–Polish–Ukrainian trilateral pact Czech Corridor Giedroyc Doctrine Hellenoturkism Intermarium (region) Intermediate Region Kresy List of proposed state mergers Lithuanian–Polish–Ukrainian Brigade Lublin Triangle Georgian–Polish alliance Polish–Lithuanian–Ruthenian Commonwealth Polish–Romanian alliance Polish–Ukrainian alliance Prometheism , a Finnish policy of the era aiming to ally with countries of the region. Romanian Bridgehead Three Seas Initiative Union of Bulgaria and Romania Union of Hungary and Romania Visegrád Group References Bibliography Janusz Cisek, Kilka uwag o myśli federacyjnej Józefa Piłsudskiego, Międzymorze – Polska i kraje Europy środkowo-wschodniej XIX-XX wiek (Some Remarks on Józef Piłsudski's Federationist Thought, Międzymorze — Poland and the East-Central European Countries in the 19th–20th Centuries), Warsaw, 1995. Marek Jan Chodakiewicz, Intermarium: The Land between the Black and Baltic Seas (Transaction Publishers) New Brunswick, NJ. 2012. Marian Kamil Dziewanowski, "Polski pionier zjednoczonej Europy" ("A Polish Pioneer of a United Europe"), Gwiazda Polarna (Pole Star), vol. 96, no 19 (September 17, 2005), pp. 10–11. M.K. Dziewanowski, Czartoryski and His Essai sur la diplomatie, 1971, ASIN: B0072XRK6. M.K. Dziewanowski, Joseph Pilsudski: a European Federalist, 1918–1922, Stanford, Hoover Institution, 1979. Peter Jordan, Central Union of Europe, introduction by Ernest Minor Patterson, Ph.D., President, The American Academy of Political and Social Science, New York, Robert M. McBride & Company, 1944. Jonathan Levy, The Intermarium: Madison, Wilson, and East Central European Federalism, , 2006 Sławomir Łukasiewicz, Trzecia Europa: Polska myśl federalistyczna w Stanach Zjednoczonych, 1940–1971 (Third Europe: Polish Federalist Thought in the United States, 1940–1971), Warsaw, Institute for National Remembrance (Instytut Pamięci Narodowej), 2010, . Anna Mazurkiewicz (University of Gdańsk), review of Sławomir Łukasiewicz, Trzecia Europa: Polska myśl federalistyczna w Stanach Zjednoczonych, 1940–1971, in Polish American Studies: A Journal of Polish American History and Culture, Published by the Polish American Historical Association, vol. LXVIII, no. 1 (Spring 2011), ISSN 0032-2806, pp. 77–81. Piotr Okulewicz, Koncepcja "miedzymorza" w myśli i praktyce politycznej obozu Józefa Piłsudskiego w latach 1918–1926 (The Concept of Międzymorze in the Political Thought and Practice of Józef Piłsudski's Camp in the Years 1918–1926), Poznań, 2001, . Antoni Plutynski,