The animal still end up building the windmill but Napoleon claimed he came up with the idea and Snowball stole it.
Napoleon opened up trade relations with neighboring human farmers which is not allowed as animal farm is run by animals and when the chickens whos eggs were being traded protested he had them executed.
Napoleon had boxer one of the most hard working animals sold to a glue maker to buy more whiskey and he lied to the other animals saying he was being taken to the hospital for his illness
Horse Slaughterer and Glue Boiler
The original 7 rules of animal farm have been changed to just one by the pigs who now run the farm with a iron fist.
All animals are equal but some are more equal than others
As the animals looked into the barn at the pigs playing cards,drinking, and talking to the humans they could no longer tell the difference between who was who