Help with grammar mistakes if any...thanks.?

The movie I chose to watch was Animal Farm. Animal Farm is a novel that George Orwell wrote. The movie based on the book is about betrayal and corruption. The movie has a cast of animated animals that portray figures of real life such as Joseph Stalin, Leon Trotsky, Karl Marx, Vladimir IIych Lenin, and Adolf Hitler. The movie tells of the animal revolt against their cruel human master. Once the animals exile their owner they come up with a couple of rules like, “Every animal is equal”. The animals want to rule together and equally take over, but then the pigs start taking control. Soon a pig leader emerges named Napoleon who uses military force (enforced by his brainwashed dogs) to intimidate other animals. Napoleon proves to be treacherous. What he once fought against, he soon became.