The Gallic War is a major event in the history of the West. It is therefore astonishing that the history of the men who led this conquest has so little interested historians of the past. Fortunately, the first archaeological excavations, initiated by Napoleon III, made it possible to deepen our knowledge of this period, limited until then to ancient written sources, and to clarify our image of Caesar's men. Nevertheless, the representation of this army was for a long time limited to the sole legionary. However, we know that many Gauls, “allies of Rome” and mercenaries of various origins contributed to the success of the Roman eagles. Caesar himself mentions them in his writings. Now, thanks to recent archaeological discoveries and new analyzes of ancient texts, we have a more accurate view of the Caesarean army. Through a vast synthesis enriched by an original iconography and a series of unpublished plates of exceptional precision, the authors approach all aspects of the daily life of the men who made up this army.