Animal Farm is a British animated film by Halas and Batchelor, based on the book of the same name by George Orwell, that was published in England on August 17, 1945, and written during World War II. It was the first British animated feature released worldwide. Despite the title and Disney-esque animal animation, it is in fact a no-holds-barred adaptation of George Orwell's classic satire on Stalinism, with the animals taking over their farm by means of a revolutionary coup, but then discovering that although all animals are supposed to be equal, some are more equal than others.

From Wikipedia

Animal Farm

Animal Farm is a dystopian allegorical novella by George Orwell. Published in England on 17 August 1945, the book reflects events leading up to and during the Stalin era before World War II. Orwell, a democratic socialist and a member of the Independent Labour Party for many years, was a critic of Joseph Stalin and was suspicious of Moscow-directed Stalinism after his experiences with the NKVD during the Spanish Civil War. In a letter to Yvonne Davet, Orwell described Animal Farm as his novel "contre Stalin".

The original title was Animal Farm: A Fairy Story, but A Fairy Story was dropped by the US publishers for its 1946 publication. Of all the translations during Orwell's lifetime, only Telugu kept the original title. Other variations in the title include: A Satire and A Contemporary Satire. Orwell suggested for the French translation the title Union des républiques socialistes animales, recalling the French name of the Soviet Union, Union des républiques socialistes soviétiques, and which abbreviates URSA, which means "bear", a symbol of Russia, in Latin.