Gaul occupies two connected positions in the book: it is an example of why conquered territory composed of many former principalities remains difficult to hold, and it is later the destination of Septimius Severus’s final campaign against Albinus. In both contexts, Gaul represents a political space whose local divisions, memories, and rival claims make conquest inseparable from the problem of durable authority.

Political Structure and the Problem of Conquest

Gaul is discussed alongside Spain and Greece as a province once divided among numerous small princedoms. That political structure distinguished it from the centralized kingdom of Darius, conquered by Alexander the Great. In a centralized state, once the ruling dynasty had been defeated or extinguished, the population possessed few alternative rulers with independent authority. In Gaul, by contrast, local dynastic memories and regional powers preserved potential centers of resistance.

The Romans therefore experienced repeated risings in Gaul, as well as in Spain and Greece. The persistence of these rebellions is attributed not simply to military difficulty or to the relative ability of the conquerors, but to the political character of the conquered territories. While memories of the former princedoms survived, Roman rule could not regard its possession as secure. Only the authority and long continuance of Roman government gradually wore away that memory, after which the inhabitants came to recognize no lords other than the Romans.

Law, Language, and Local Continuity

Gaul also belongs to the wider problem of governing acquired provinces whose language, usages, and laws differ from those of the conquering power. Such differences multiply the difficulties of retention because conquest does not automatically produce political incorporation. A ruler who acquires a state resembling his own in language and custom can usually preserve it by eliminating the former ruling line while leaving laws and taxes substantially unchanged; a more dissimilar province demands closer supervision, stronger political judgment, and greater fortune.

The book presents personal residence, colonies, or military occupation as possible instruments of control in such territories. Residence allows a prince to detect disorder early, prevents officials from pillaging the province unchecked, and gives subjects direct access to the ruler. Colonies can secure key positions at comparatively low cost, whereas permanent troops consume the country’s revenues and create resentment through the burdens of their movement and maintenance. The broader principle is that local conditions must be managed rather than ignored: a conqueror must protect weaker neighbors, weaken stronger powers, and prevent an equally formidable foreign ruler from entering through the invitation of discontented inhabitants.

Roman Rule and the Erosion of Former Powers

Gaul’s historical importance in the argument lies in the contrast between immediate conquest and lasting possession. The Romans could not assume that military victory had ended the political life of the old order. Former principalities supplied memories, loyalties, and possible leaders around which rebellion could gather. The passage of time under Roman authority was consequently not incidental; it was itself an instrument of rule, gradually replacing the remembered legitimacy of local princes with Roman supremacy.

This example is paired with the Roman treatment of other acquired territories. Roman rulers planted colonies, conciliated weaker powers without allowing them to grow too strong, humbled major rivals, and prevented formidable outsiders from gaining influence. The treatment of Gaul thus supports a general theory of imperial governance in which security depends on controlling the province’s internal balance and on anticipating the political uses of local discontent.

Gaul in the Struggle for the Roman Empire

Gaul later becomes the setting for the decisive confrontation between Septimius Severus and Albinus. After defeating Niger and restoring tranquillity in the East, Septimius Severus returned to Rome and accused Albinus of treacherously seeking his destruction despite the favors previously granted him. He then went to Gaul, where he deprived Albinus of both his dignities and his life.

The episode completes Septimius Severus’s rise from a new claimant to sole master of the Empire. Earlier, he had advanced toward Rome under the pretext of avenging Pertinax, persuaded the Senate through fear to elect him Emperor, and dealt with the two remaining rivals by combining force against Niger with deception against Albinus. Gaul was the western theater in which that unfinished rivalry ended. Its appearance in the narrative therefore links the province’s earlier role as a site of recurrent resistance to its later role as the place where imperial unity was violently imposed.

Narrative and Political Significance

Gaul is not treated as a merely geographic background. It functions as a comparative historical case through which the book distinguishes centralized kingdoms from territories composed of many local powers. Its repeated risings show that conquest must overcome not only armies but also political memory. Its later appearance in the campaign against Albinus gives the province a second significance: it becomes the space where a rival’s residual authority is extinguished and a new imperial order is consolidated.

Taken together, these references make Gaul a model of the long afterlife of conquered institutions. A province may be subdued in battle yet remain politically unsettled so long as older rulers, laws, and loyalties retain meaning. Durable rule emerges only when those alternative sources of allegiance have been weakened by sustained authority, administrative control, and the removal of rival claimants.