English summary: This volume simultaneously presents a critical edition based on the entire direct and indirect manuscript tradition, and a historical commentary which reviews the principal problems encountered at the end of the civil wars. French description: Les livres 48 et 49 de l'Histoire Romaine de Dion Cassius presentent les evenements de 52 a 32 avant J.-C., en particulier la guerre de Perouse, la guerre contre Pompee et la campagne d'Antoine...