How do the actions of napoleon aid in advancing the plot and shaping and refining the theme in chapter 5 and 6 of Animal Farm?

In chapters 5 and 6 of Animal Farm, Napoleon's actions, such as his manipulation of Snowball's expulsion and his consolidation of power, drive the plot by escalating the conflict between the pigs and the other animals. His increasingly authoritarian rule and the use of Propaganda highlight themes of betrayal and the corruption of revolutionary ideals. By altering the commandments and using fear tactics, Napoleon shapes the narrative to showcase the gradual erosion of equality and freedom on the farm. This shift emphasizes the overarching theme of how power can corrupt, leading to the oppression of the very individuals who sought liberation.