 The United Hungarian Party (EMP) led by János Esterházy and Andor Jaross played a fifth column role during the disintegration of Czechoslovakia in late 1930s.Investigation of the Nuremberg trials proved that both Nazi Germany and Horthy Hungary used their minorities for internal disintegration of Czechoslovakia; their goal was not to achieve guarantees of their national rights, but to misuse the topic of national rights against the state whose citizens they were.According to international law, such behavior belongs to illegal activities against sovereignty of Czechoslovakia and activities of both countries were evaluated as an act against international peace and freedom.