The answer is Don Quixote fights against a group of windmills based on the Don Quixote novel. This part of a story is taken from "The Ingenious Nobleman Mister Quixote of La Mancha" novel written by Miguel de Cervantes Saavedra in the 1600s. This part is taken from the eighth chapter of the first book where Don Quixote wrongly guessed his enemy as giants.