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The Solidarity movement in Poland staged a warning strike, the largest in the history of the Eastern Bloc, in which at least 12 million Poles walked off their jobs for four hours.
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Solidarity (Polish trade union)
20th-century Polish trade union
Solidarity, full name Independent Self-Governing Trade Union "Solidarity", is a Polish trade union founded in August 1980 at the Lenin Shipyard in Gdańsk, Poland. Subsequently, it was the first independent trade union in a Warsaw Pact country to be recognised by the state.Source: Wikipedia (CC BY-SA)
1981 warning strike in Poland
Nationwide strike to protest the Bydgoszcz events
The 1981 warning strike in Poland was a four-hour national warning strike that took place during and in response to the Bydgoszcz events. There, in the early spring of 1981 in the Polish People's Republic, several members of the Solidarity movement, including Jan Rulewski,…Source: Wikipedia (CC BY-SA)
Eastern Bloc
Former group of communist states aligned with the Soviet Union during the Cold War
The Eastern Bloc, also known as the Communist Bloc (Combloc), the Socialist Bloc, the Workers Bloc, and the Soviet Bloc, was an unofficial coalition of communist states of Central and Eastern Europe, Asia, Africa, and Latin America that were aligned with the Soviet Union and…Source: Wikipedia (CC BY-SA)