
Based on archival materials of various provenance (including the Czechoslovak, PRL and Soviet security apparatus), the text reconstructs the genesis, course and effects of the operation directed against a group of couriers trained and transferred from the West to Poland and the Ukrainian SSR by the Foreign Formations of the Organization of Ukrainian Nationalists. The actions codenamed „Stonka” in Poland were an element of a larger disinformation „game” conducted by the MGB/KGB since 1951. The finalization and disclosure of the aforementioned operations also meant that the Soviets initiated a new propaganda campaign against the emigration Ukrainian structures in the West originating from the Bandera faction of the OUN.