A lot of history behind the V4 going back to the First Congress of Visegrád in 1335.
Poland, Bohemia, and Hungary teamed up to try to counter the hegemony of the Hapsburg Empire, and create new trade routes to bypass the international port of Vienna in order to have better access to European markets.
Poland, Bohemia, and Hungary teamed up to try to counter the hegemony of the Hapsburg Empire, and create new trade routes to bypass the international port of Vienna in order to have better access to European markets.