Who was the leader of the worker's union in Poland that challenged Soviet rule?

Name: Who was the leader of the worker's union in Poland that challenged Soviet rule?
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Lech Walesa was the leader of the Solidarity movement, which was a trade union that challenged Soviet rule in Poland and eventually helped bring about the collapse of communist rule in Poland in 1989. Alexander Dubcek was the leader of the Prague Spring reforms in Czechoslovakia, and Joseph Broz Tito was the leader of Yugoslavia.

Who Was the Leader of the Worker's Union in Poland