In the 1960s, continuous liberalisation reforms in then Czechoslovakia eventuate in the Prague Spring granting additional freedoms such democratization of the society, political liberalization or loosening of restrictions on the media, speech and travel in order to warily reform socialist political system in the country. Such actions and attempts were threatening the Soviet domination in Central Europe. As a result, on the night of 20 to 21 August 1968 Warsaw Pact troops crossed the borders and attacked Czechoslovakia. Eastern Bloc armies under command of Soviet Union consequentially occupied whole country what was denounced by the western countries and condemned by many others. Those who experienced the era know well. All others can get familiar with it at various exhibitions, memorial events or discussions in order to commemorate the 50th anniversary of the invasion of Czechoslovakia, the vesper of the socialism with a human face.