History of the Soviet Union (1964–82) Brezhnev remained wary of any sort of intervention and Kosygin reminded leaders of the consequences of the Soviet suppression of the 1956 Hungarian revolution. In the aftermath of the invasion the Brezhnev Doctrine was introduced; it stated that the Soviet Union had the right to intervene in any socialist country on the road to communism which was deviating from the communist norm of development. The doctrine was condemned by Romania, Albania and Yugoslavia. As a result, the worldwide communist movement became poly-centric, meaning that the Soviet Union lost its role as 'leader' of the world communist movement. In the aftermath
Military history of the Soviet Union the territories populated mostly by ethnic Belarusians and Ukrainians. Next, Soviet Union sent ultimatums to the Baltic states and gained control in September and October. The Soviet Union had negotiated with the Finns for over a year, but they refused Soviet demands, and the Red Army assaulted on 30 November 1939 starting the Winter War. Simultaneously, a puppet regime, called the Finnish Democratic Republic, was set by the Soviets. The initial period of the resulting war proved disastrous for the Soviet military. As a direct result of the Soviet aggression the Soviet Union was expelled from the League of Nations