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Mongolian Emperor whose empire stretched from the Black Sea to the Pacific Ocean (1162-1227)
grand duke of Muscovy whose victories against the Tartars laid the basis for Russian unity (1440-1505)
Russian founder of the Bolsheviks and leader of the Russian Revolution and first head of the USSR (1870-1924)
Soviet statesman whose foreign policy brought an end to the Cold War and whose domestic policy introduced major reforms
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