In this pivotal chapter, the tension between two prominent pigs, Napoleon and Snowball, escalates as they vie for control over the future of Animal Farm. After the successful rebellion against Mr. Jones, the animals have embraced the principles of Animalism, but the division among the pigs becomes increasingly evident. Snowball is enthusiastic about improving the farm and introduces the ambitious idea of constructing a windmill to generate electricity, which he believes will ease the animals' work and improve their quality of life.

Napoleon, however, is not supportive of Snowball's vision. He prefers to consolidate power and is skeptical of Snowball's plans, believing they are too ambitious and impractical. This difference in opinion fosters a rift between the two pigs, leading to heated debates at the weekly meetings where all animals are encouraged to contribute.

During one of these meetings, Snowball passionately advocates for the windmill, using persuasive rhetoric to sway the other animals. He outlines the benefits, explaining how it will allow them to have more leisure time and lessen their burdens. However, Napoleon employs a more manipulative tactic. He uses the dogs he has secretly raised to intimidate Snowball and disrupt the proceedings. When Snowball suggests a vote on the windmill, Napoleon suddenly calls for his dogs, who chase Snowball off the farm, effectively expelling him from Animal Farm.

The expulsion of Snowball marks a significant turning point in the story, as it signifies the beginning of Napoleon's unchallenged authority. After Snowball's departure, Napoleon quickly moves to consolidate his power further. He informs the other animals that they will not be able to discuss the windmill or any other major decisions without his approval. To maintain control and suppress dissent, he uses Squealer as his spokesperson, who manipulates language and information to justify Napoleon's actions and vilify Snowball, now depicted as a traitor.

The chapter concludes with the animals feeling confused and apprehensive about the future. The idealism that once fueled the rebellion begins to erode as they witness the consolidation of power by the pigs. The animals are left to grapple with their loyalty to the principles of Animalism while being subjected to the growing authoritarian rule of Napoleon. This chapter not only highlights the struggle for power but also foreshadows the increasing tyranny that will characterize Napoleon's leadership, as the original ideals of the revolution begin to crumble under the weight of corruption and betrayal.