The Gallic Wars

… is the passage in Caesar’s Commentarii de bello Gallico (52–51 bc; The Gallic War) in which he names five of them together with their functions. Mercury was the most honoured of all the gods and many images of him were to be found. Mercury was regarded as the inventor of…

…made some judicious observations in Commentarii de bello Gallico about their social and political organization, but his remarks on their religion were rather perfunctory. Contrasting Germans with the Celts of Gaul, Caesar claimed that the Germans had no druids (i.e., organized priesthood), nor zeal for sacrifice, and counted as gods…

Caesar described these campaigns in De Bello Gallico (“On the Gallic War”).