 Having attended a meeting in Munich in 1940 organised to bring together pro-Nazi Swiss leaders, Oehler was tried for treason by a federal court in 1957 and sentenced to two years in prison.Upon his release Oehler became a leading member of the Volkspartei der Schweiz and headed up the Swiss branch of "Nation Europa", an international neo-Nazi journal.He also adopted the pseudonym Hans Rudolf to translate works into German, notably "Nuremberg ou la Terre Promise" of Maurice Bardèche, as well as writing for the far right journal "Turmwart".