Eric Walker placed Soviet Union under Communism
Eric Walker added a number of topics and a number of links to Soviet Union, and added Soviet Union to Ancient and historical places
Eric Walker added 1922 Soviet Union to Ancient and historical places, and added Ancient and historical places to Places and History, prehistory and geologic time
Eric Walker added a number of topics and a number of links to History, prehistory and geologic time, and added History, prehistory and geologic time to Time