Old major gives a speech about how the humans are the animal's enemy because Mr. Jones does not feed them. They listen to old major and old major wants them to rebel against jones. He wants this so he could have made a utopia. He teaches them a song because he wants to give the rebellion a chant. Old major says he doesn't have much longer to live.
The animals rebel after old major dies because they want to be free and have more food. They do this because they want to have a better life than it is now. They only did this after old major died because they wanted to make sure this pig wasn't telling crazy stuff but most of it made sense in their mind at the time. Once Mr. Jones forgets to feed them again they rebel.
Snowball is chased off the farm by napoleon's dogs that he hired for a secret police. Napoleon is now the only leader on the farm. Napoleon hires this team of dogs to use fear to drive his leadership and make sure everyone follows his rules. He is very unfair and his team of pigs does stuff like changing the rules in favor of the pigs. He made it so life on the farm is the same or worse than the life they had while Mr. Jones was in charge.
The battle of the windmill was the second battle after the rebellion. The battle was when the humans came to take the farm down at least that was their goal. The humans did not succeed. The humans took down the windmill in an explosion. Also, they killed more animals.
Boxer gets hurt from carrying stones to the windmill and his lung has some problems. He is given medicine from Mr. Jones' house and is taken care of in the stables for a few days. Then a van comes and napoleon tells the animals that he is going to the hospital. He is actually brought to his death in a slaughter house. Napoleon tells them that he died in the hospital.
The pig go to the sheep and make them learn a new song. The sheep learn to say four legs good two legs better. They start to say it and then clover comes and neighs really loud. Clover called all the animals over to see and it was the pigs marching around on two legs and the sheep saying the new song. They are holding whips and acting like humans. This shows that they have not had a better life but a worse one because they had bad government and things weren't fair at all.