Międzymorze

Międzymorze (Polish pronunciation: [mʲɛnd͡zɨˈmɔʐɛ]), known in English as Intermarium, was a plan, pursued after World War I by Polish leader Józef Piłsudski, for a federation, of Central and Eastern European countries. Invited to join the proposed federation were the Baltic states (Lithuania, Latvia, Estonia, Finland), , Belarus, Ukraine, Hungary, Romania, Yugoslavia and Czechoslovakia.

The Polish name Międzymorze, which means "Intersea" or "Between-seas," was rendered into Latin as "Intermarium."

The proposed federation was meant to emulate the Polish-Lithuanian Commonwealth, stretching from the Baltic Sea to the Black Sea, that, from the end of the 16th century to the end of the 18th, had united the Kingdom of Poland and the Grand Duchy of Lithuania.

Intermarium complemented Piłsudski's other geopolitical vision—Prometheism, whose goal was the dismemberment of the Russian Empire and that Empire's divestment of its territorial acquisitions.