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Wojciech Jaruzelski was a Polish military leader who became the country's president from 1989 to 1990. He was also the last commander-in-chief of the Polish Army, holding that position from 1983 to 1990. Jaruzelski was a controversial figure, as he was responsible for the declaration of martial law in Poland in 1981. However, he is also credited with helping to bring about the end of communism in Poland.