Answer: The animals attack Frederick and his men because they are going after the windmill, and the windmill is a symbol of Animal Farm. The windmill is symbolic of the animals' success in owning their own farm.The pigs feel that the Battle of the Windmill was a success, but the other animals didn't think so. They thought that it was a disaster because the windmill was ruined. The pigs convinced them that it was a success.
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