The final battle in The Rap3 of the Lock is the pinnacle of the long sequence of mock-heroic military actions. The Pope presents it in mock-epic style by invoking the name of the Roman gods that were most active in warfare, and he mentions Aeneid, while comparing the indomitable Baron to Aeneas who left his love to be the founder of Rome. The tossing of the snuff makes for a flawless turning point, which is perfectly suited to the magnitude of this battle.
If an author is writing about historical events, they should include historical material, but to emphasize it he should also probably add dialogue or a narrator, depending on the story.
