1968 Red Square demonstration

The 1968 Red Square demonstration (Russian: Демонстра́ция 25 а́вгуста 1968 го́да) took place in Moscow on 25 August 1968. It was a protest by eight demonstrators against the invasion of Czechoslovakia on the night of 20–21 August 1968 by the Soviet Union and its Warsaw Pact allies, crushing the Prague Spring, the challenge to centralised planning and censorship by communist leader Alexander Dubček.

Source: Wikipedia — 1968 Red Square demonstration (CC BY-SA 4.0)