"k."Decisive political events took place in Poland shortly before the Hungarian Revolution of 1956. Władysław Gomułka, a reformist party leader, was reinstated to the Politburo of the PZPR and the Eighth Plenum of its Central Committee was announced to convene on 19 October 1956, all without seeking a Soviet approval. The Soviet Union responded with military moves and intimidation and its "military-political delegation", led by Nikita Khrushchev, quickly arrived in Warsaw. Gomułka tried to convince them of his loyalty but insisted on the reforms that he considered essential, including a replacement of Poland's Soviet-trusted minister of defense, Konstantin Rokossovsky. The disconcerted Soviets returned to Moscow, the PZPR Plenum elected Gomułka first secretary and removed Rokossovsky from the Politburo. On 21 October, the Soviet Presidium followed Khrushchev's lead and decided unanimously to "refrain from military intervention" in Poland, a decision likely influenced also by the ongoing preparations for the invasion of Hungary. The Soviet gamble paid off, because Gomułka in the coming years turned out to be a very dependable Soviet ally and an orthodox communist.