History of the Soviet Union (1964–82) Soviet Union "would result in a crushing retaliatory blow". Though Brezhnev's time in office would later be characterized as one of stability, early on, Brezhnev oversaw the replacement of half of the regional leaders and Politburo members. This was a typical move for a Soviet leader trying to strengthen his power base. Examples of Politburo members who lost their membership during the Brezhnev Era are Gennady Voronov, Dmitry Polyansky, Alexander Shelepin, Petro Shelest and Podgorny. Polyansky and Voronov lost their membership in the Politburo because they were considered to be members of the "Kosygin faction." In their place came Andrei
Collective leadership in the Soviet Union of the collective" even after becoming Chairman of the Council of Ministers (Premier of the Soviet Union), replacing Nikolai Bulganin. Most Western observers believed that Khrushchev had become the supreme leader of the Soviet Union by the early 1960s, even if this was far from the truth. The Presidium, which had grown to resent Khrushchev's leadership style and feared Mao Zedong's one-man dominance and the growing cult of personality in the People's Republic of China, began an aggressive campaign against Khrushchev in 1963. This campaign culminated in 1964 with the replacement of Khrushchev in his offices of First Secretary by