At the beginning of the story, Mr. Jones was the owner of the farm. He was cruel to the animals, frequently abusing them verbally and physically. He mistreated them, and wouldn't feed them. He was a drunkard and wasn't a good farmer. Old Major told the animals of a dream of a better time where the animals would rule the farm.
Our hard work!
After Old Major died, the animals prepared for the rebellion, but they had no idea when it would take place. Then one night, Mr. Jones was drunk and forgot to feed the animals. They were so hungry that they broke into the food shed to eat. The humans hear and tried to hit and beat the animals, but they retaliated. The animals chased Mr. Jones and his men off the farm.
The animals had been living on their own, but Mr. Jones had gone off and told everyone of his story. He told other farmers that it might happen to their farms, so they banded together to attack the animals. Snowball and the pigs knew of the attack and Snowball planned how they would attack. There were multiple lines and the battle ended when Boxer believed he killed a man.
In the Battle of the Windmill, Frederick's, a farmer who knew Mr. Jones, attacked the farm because he knew they were weak. He and his men advanced with guns and explosives, aiming to blow up the windmill. When they succeed in their task, they were chased off the farm by the animals in their blindness of rage.
When trying to rebuild the windmill, Boxer strains himself, causing him to collapse. All the animals rush to his aid except the pigs and dogs. Napoleon had apparently called for an ambulance when in reality he called a horse slaughtering place. Boxer is sent to his death with the reasoning that a horse doctor bought the car from a previous horse slaughtering company. Napoleon shows his true colors as a dictator in this scene.
GET BACK TO WORK!
Can't you see? They're sending him to his death! They're going to kill him!
Many years after the rebellion, the pigs have learned to walk on their hind legs, and they started to smoke pipes and carry around whips as they oversaw the animals work. The other, lesser, animals realize what they have gotten themselves into, and it can be seen that the pigs are more human than animal. The farm's name is changed back to Manor Farm and the pigs are now friendly with humans. At the very end of the book, the pigs play poker with the humans and one of them cheats.