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
Soviet reaction to the Polish crisis of 1980–1981 once again, on 13 December 1981, Jaruzelski finally proclaimed martial law. To justify the emergency measures, Jaruzelski was still playing on the public fear of Soviet invasion. However, there was no significant resistance to the martial law and any foreign military backing proved unnecessary. Ever since, Jaruzelski himself has denied that he invited Soviet troops, insisting that, on the contrary, the martial law was aimed at prevention of a Soviet military intervention. In November 1997, a conference was held in Jachranka on the Soviet role in the Polish crisis of 1980–1981, where Solidarity, Polish communist, Soviet and American participants of