Burn! (1971)

During the 1840s, Britain sends secret agent Sir William Walker (Marlon Brando) to break up Portugal's sugar monopoly on the fictional Caribbean island of Queimada. Walker incites the slaves to revolt under the leadership of a dock worker, José Dolores, while simultaneously convincing plantation owners to turn against the government. A decade later, however, Walker must return to Queimada to confront his one-time pupil, Dolores, who now leads a revolt to throw out the British.