The concept of a "Central Eastern European Union"— a triangular geopolitical entity anchored in the Baltic, Black, and Adriatic or Aegean Seas—was revived during World War II in Władysław Sikorski's Polish Government in Exile. A first step toward its implementation—1942 discussions between the Greek, Yugoslav, Polish and Czechoslovak governments in exile regarding prospective Greek-Yugoslav and Polish-Czechoslovak federations—ultimately foundered on Soviet opposition, which led to Czech hesitation and Allied indifference or hostility. A declaration by the Polish Underground State in that period called for the creation of a Central and Eastern European federal union undominated by any one state.