Commentarii de Bello Gallico (The Gallic War)

Julius Caesar's Commentarii de Bello Gallico, his own first person account of his campaigns in Gaul, is the primary ancient source for its description of druidic religion and society in Book Six, written by a Roman general and politician who had direct contact with Gallic peoples during the conquest he himself led. Its authority is that of an eyewitness account from someone with genuine access to the culture he describes. Its limit is exactly that position: Caesar wrote to justify his own conquest to a Roman audience, and classical historians divide on how much of his account of druidic practice reflects direct observation against Roman ethnographic convention and political framing, rather than treating it as a plain, disinterested report. Cite it as the primary ancient testimony it is, read alongside that scholarly debate over its reliability.