20
"Major reveals his dream to the other animals."
"Major teaches the other animals a new song."
"Major dies."
"The animals expel the farmer, Jones."
"The animals adopt the name 'Animal Farm'."
"Seven commandments are drawn up for the animals to follow."
"The animals are victorious at the Battle of the Cowshed."
"Mollie leaves Animal Farm to return to her old way of life."
"Snowball draws up plans for a windmill."
"Napoleon drives out Snowball with fierce dogs."
"The animals begin work on the windmill."
"The pigs move into the farmhouse to live."
"The windmill is destroyed on a night of storms."
"Napoleon orders the death of some 'disloyal' animals."
"Napoleon sells timber to Frederick."
"Frederick and his men blow up the windmill."
"Boxer collapses from overwork."
"Boxer is sent to his death at the knacker's yard."
"The pigs begin to walk on their hind legs."
"The pigs cannot be told apart from the humans."