The article will analyse the development of the Chilean cause in the politics of Eastern Europe countries since 1973, focusing on the Czechoslovak case. On the one hand, it will prove that during the communist government Czechoslovakia played an important role in the international campaign for the resistance against the dictatorship at a worldwide level. On the other hand, it posits that the propaganda aimed at Czechoslovakia, which sought to kindle society's belief in the revolutionary ideals strongly affected after the Soviet invasion in 1968, turned out to be much less effective.