Stepan Mudryk led the OUN (b) intelligence for the longest time – from 1951 until almost the end of the 1980s. At the same time, he went out in the history as a consistent fighter for Ukraine’s independence. From 1991 he held the position of the Head of the Main Council of the OUN. For ten years he was Vice President of the World Congress of Free Ukrainians in Europe. For 11 years he headed the Coordination Center of the Ukrainian public institutions in Europe. He had written a number of monographs, books, and articles on the history of the national liberation struggle and the activities of the OUN and UPA since the 1940s.