The film was shot with the participation of Zap. Berlin, USA, Japan 1-4h. Proclamation of the Republic in 1931. Repression of the miners' right-wing authorities in Asturias. The victory of the popular front over the national (right) front in the elections of 1936. The beginning of the civil war, the participation of international brigades in it, participation in the battles of Soviet people, executions and their exile in the USSR. The battles for Toledo, Madrid. Interviews of scientists and historians. 5-6h Rise of Franco. Stalinist repressions in the USSR and "purges" in Spain. Participation of volunteers from 54 countries in international teams. Treaty of European states on non-interference. Farewell parade of volunteers in Barcelona in 1938.