Factual error: The famous battle between Stegosaurus and Tyrannosaurus Rex (which is incorrectly depicted as having three claws) never took place: Stegosaurus was extinct before Tyrannosaurus evolved. (Stegosaurus lived in the Jurassic, Tyrannosaurus in the Cretaceous.)
Fantasia (1940)
1 factual error - chronological order
Starring: Corey Burton, Walt Disney, Leopold Stokowski, Deems Taylor
Continuity mistake: When Mickey and the broom come to the fountain for the first time, the angle of water flowing into the fountain changes between shots.
Trivia: Walt Disney's Fantasia was the first film in history to use stereophonic sound.