Usurper Nepotianus Falls: Rome's Instability Deepens

Troops loyal to the usurper Magnentius killed the rival claimant Nepotianus in Rome on June 30, 350 AD, ending his 28-day attempt to seize imperial power. Born into the Constantinian dynasty as the son of Constantine the Great's half-sister Eutropia, Nepotianus had leveraged his family name and a force of gladiators to take the city of Rome while the broader empire was in chaos following the murder of Emperor Constans by Magnentius's forces. The episode was a small but telling example of the violent fragmentation that characterized the later Roman Empire. Nepotianus's seizure of Rome had been an opportunistic gamble during a period of acute political instability. The empire was effectively in civil war, with Magnentius controlling the western provinces and Constantius II, Constantine's sole surviving son, holding the east. Nepotianus tried to claim a place in this contest by occupying the ancient capital, but Rome in 350 AD was no longer the strategic center it had been. The real power resided with the field armies and the generals who commanded them. Nepotianus had neither. When Magnentius dispatched his general Marcellinus with regular troops, the outcome was never in doubt. Nepotianus was captured and executed, along with his mother and supporters. Marcellinus reportedly conducted a broader purge of Nepotianus's allies in Rome, establishing Magnentius's authority in the city. The episode illustrated several characteristics of late Roman politics: the continuing power of the Constantinian name, the willingness of ambitious men to gamble everything on a bid for the throne, and the irrelevance of Rome itself as a center of political power. The empire's true capitals were wherever the emperors and their armies happened to be.