HELP! If anyone has read 1984 by George Orwell, PLEASE help.?

During Winston’s interrogation, O’Brien explains that whereas preceding totalitarian regimes had failed, the Party was truly successful in its consolidation of power. How, according to O’Brien, does the Party as an oligarchy differ from Nazism or Russian Communism? How does he define the role of the martyr, both in terms of the Party and the other totalitarian systems?