About three months later, the animals revolt against Mr Jones and take over the farm. They change its name to "Animal Farm". They decide the farm will now be ruled only by animals, calling the system "animalism". They write seven commandments, with the most important being "All animals are equal". “Four legs good, two legs bad” becomes a popular chant for the sheep. Mr Jones and his friends attack the farm to try to take it back, but in the "Battle of the Cowshed" the animals drive them away. Mr Jones flees and never returns.