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
Railway system of the Soviet Union Railway system of the Soviet Union The Soviet Railways (Russian: Cоветские железные дороги (CЖД)) was the state owned national railway system of the Soviet Union, headquartered in Moscow. The railway started operations in December 1922, shortly after the formation of the Soviet Union. It operated until the dissolution of the Soviet Union in December 1991. The Soviet Railways were the largest unified railway in the world and the backbone of the Soviet Union's economy. Soviet Railways greatly upgraded and expanded the Russian Imperial Railways to meet the demands of the Soviet Union. The railway was directly under the control of