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
Polish prisoners-of-war in the Soviet Union after 1939 prison camps run by the NKVD. Of these, the Soviet authorities released 42,400 soldiers (mostly soldiers of Ukrainian and Belarusian ethnicity serving in the Polish army who lived in the former Polish territories now annexed by the Soviet Union) in October. The 43,000 soldiers born in West Poland, then under German control, were transferred to the Germans; in turn the Soviets received 13,575 Polish prisoners from the Germans. Poland and the Soviet Union never officially declared war on each other in 1939; the Soviets effectively broke off diplomatic relations when they withdrew recognition of the Polish government at the start