Since 1956 the enor­mous ter­ri­tory of the Soviet Union con­sisted of fif­teen union republics  —  the large admin­is­tra­tive and polit­i­cal units  —  offi­cially known as Soviet republics.  By far the largest and most impor­tant of the union republics was the Russ­ian Repub­lic, con­tain­ing about 51 per­cent of the pop­u­la­tion. Pri­mar­ily because it encom­passed Siberia, the Russ­ian Repub­lic alone accounts […]

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