Manor Farm is, frankly, a horrid place. The animals are mistreated and neglected by their drunkard owner, Mr. Jones. But..revolution is brewing.
A old prize pig, Old Major, advocates for a rebellion and takeover of the farm, flanked by fellow pigs Napoleon, Snowball and Squealer. The song "Beasts of England" became their anthem as other animals pledge their support.
After Old Major dies, the animals decide to begin their "Rebellion" and chase Jones out of the farm. The farm is renamed "Animal Farm" and the three pigs; Napoleon, Snowball and Squealer establish a quasi-communist government with 7 "Commandments" forbidding human-like behaviors
Unfortunately, the animals are forced to deal with human invaders in the Battle of Cowshed, and later on the darker colors of the other pigs come to light.
Things worsen as Napoleon and Snowball feud repeatedly, getting worse and worse until the latter decides to begin planning to make a windmill. This windmill debate reaches a boiling point leading to Snowball being banished from the farm. Napoleon takes over as leader, and steals the idea of the windmill.
When the plagarized windmill collapses (among other disasters)...Snowball is blamed for them.