Old Major the boar tells all the other animals about how they are treated badly and is convincing them to rebel against the humans
The Battle of the Cowshed - the Farmers come back but the animals are prepared and defeat them for a second time
Where is all the stuff you've produced? The humans have it! We need to start a Revolution!
The Rebellion has begun - the animals are seizing the farm
The animals began to get used to their new lifestyle and relaxed a lot more. The animals also very slowly began to behave more human-like, which was strictly what you shouldn't do in their rules
The farm is doing well and all the animals are happy but Napoleon and Snowball argue about absolutely everything
That field over there is just right for cabbages don't you think?
No. It's useless for anything except roots
Napoleon dislikes Snowball a lot now and convinces the other animals that Snowball is a bad influence and that they should exile him. They do exile him in the end.