Polish Armed Forces government to resettle ethnicities immediately after the war (Operation Vistula), and to violently suppress opposition several times, during the Poznań 1956 protests, the Polish 1970 protests, and during Martial law in Poland in 1981–1982. The LWP also took part in the suppressing of the 1968 democratization process of Czechoslovakia, commonly known as the Prague Spring. That same year Marshal of Poland Marian Spychalski was asked to replace Edward Ochab as chairman of the Council of State, and General Wojciech Jaruzelski, at that time the Chief of the General Staff, was named to replace him. Michta argues that Jaruzelski, as a
Wojciech Jaruzelski appearances. However, Wałęsa persuaded the Communists' two allied parties, the United People's Party (ZSL) and the Alliance of Democrats (SD), to break their alliance with the PZPR. Accepting that he would have to appoint a Solidarity member as prime minister, Jaruzelski then asked Wałęsa to select three candidates, one of whom he would ask to form a government. Ultimately, Tadeusz Mazowiecki, who had helped organize the roundtable talks, was selected as first non-Communist prime minister of an Eastern Bloc country in four decades. Jaruzelski resigned as president in 1990. He was succeeded by Wałęsa, who had won the presidential election