The Warsaw Pact invasion of Czechoslovakia in 1968 was followed by a wave of emigration, unseen before; it stopped shortly after (estimate: 70,000 immediately, 300,000 in total).
The Warsaw Pact invasion of Czechoslovakia in 1968 was followed by a wave of emigration. This was unseen before. It stopped shortly after (estimate: 70,000 immediately in total). This was 300,000.