Flavius Aetius

Flavius Aetius was one of the most powerful figures of the late Roman Empire, a general who shaped policy and fought in wars against both Rome’s external opponents and its internal rivals. His refusal to seek the emperorship set him apart from other generals in a period when civil conflict and palace coups had become routine; his eventual murder by Emperor Valentinian III makes his career an especially stark measure of the political instability that helped bring down the Western Roman Empire.

Power in an Age of Civil War

Between AD 433 and 454, Aetius was probably the most powerful person in the empire. His influence extended beyond military command: he shaped both domestic and foreign policy, while fighting crucial battles against groups beyond Rome and against Romans in civil wars. The combination of military authority and influence over the empire’s wider business distinguished him from generals and senators of earlier periods, whose power had been more limited.

Aetius’s position was striking partly because he did not turn it into a bid for the throne. Powerful generals fighting civil wars often sought the emperorship themselves, but he did not. The restraint did not make him safe: in 454, Emperor Valentinian III murdered him. The account identifies Aetius’s murder with the designs of Petronius Maximus, who would himself be murdered in a plot hatched by Valentinian III. Aetius’s end thus belongs to a political order in which proximity to imperial power offered no reliable protection from it.

Rome and Its Unstable Allies

Aetius’s own life crossed the line between captivity and alliance. As a young man, he was held hostage first by the Goths under Alaric and later by the Huns. These groups could be enemies, allies, or both in quick succession, reflecting a late Roman Empire in which peoples once dominated and incorporated into Roman armies—or used as slaves—had come to dominate many parts of the empire.

The history of Alaric shows how contingent those relationships could be. He was at once a formidable enemy and a Roman ally, appointed in 405 to one of the army’s senior positions. The arrangement did not last: by 408 he was fighting Rome, invading Italy and sacking Rome. Aetius’s experience of hostage-taking by the Goths therefore belonged to a political world where service and opposition were not stable categories.

The Huns likewise shifted between alliance and war. After holding Aetius hostage, they later fought alongside him in a Roman civil war. Under Attila, however, they fought a major battle against Rome in 451, just across the Rhine. The Goths, under Theodoric, were then defending the Roman side. Aetius’s dealings with both peoples make his career a guide to the changing balance of power: forces once subordinated by Rome could become essential allies, dangerous enemies, or both.

Appeasement and Imperial Intrigue

Roman elites also dealt with barbarian commanders to gain advantage in struggles within the empire, not only to defend Roman territory. The Vandals under Geiseric ravaged much of the Iberian Peninsula and, from 429 onward, conquered North Africa, one of Rome’s principal sources of grain. Rome’s response included offering Geiseric Valentinian III’s young daughter as a bride. The proposed marriage did not provide a simple settlement: Geiseric was already married to the daughter of a Gothic leader, and the account describes him annulling that marriage and sending his wife back to her family after mutilating her. Because of her age, Valentinian’s daughter remained in Italy and the marriage was never consummated.

The daughter later married Petronius Maximus, whom the account identifies as the mastermind behind Valentinian III’s murder of Aetius. Maximus, in turn, would soon be murdered in a plot hatched by Valentinian. He then declared himself emperor, but his reign was brief: it ended with his death during Geiseric’s major offensive against Italy. Rome fell and was savagely plundered. The succession of political murders and failed settlements around Aetius’s story connects the court’s internal maneuvering to the empire’s vulnerability to military attack.

A Career as Evidence of Decline

Aetius’s career illuminates the difference between the early empire and its late Roman successor. Incessant civil wars and the reach of his authority contrast with the narrower power exercised by earlier generals and senators; his changing relations with Rome’s former subjects and captors also show how radically Roman fortunes had shifted. The account places his life within a broader pattern: between the death of Marcus Aurelius in AD 180 and the Western Roman Empire’s collapse in AD 476, hardly a decade passed without a civil war or a palace coup. Few emperors died naturally or in battle; most were murdered by usurpers or their own troops.

The late empire’s enemies were therefore not presented as the fundamental cause of Rome’s decline. Goths, Huns, and Vandals achieved major successes, but those successes were a symptom of a weakened political order, not its origin. Rome had once faced more organized and threatening opponents, including the Carthaginians. The deeper cause, as the account interprets it, lay in extractive political and economic institutions that generated infighting and civil war. Aetius’s rise, his unusual refusal to claim the throne, and his murder show the personal stakes of that disorder; the fall and plunder of Rome show its wider consequence.