Flavius Aetius

Anyone asking who was Flavius Aetius has to begin on the Danube frontier, far from the marble of Rome. He was born around 390 CE at Durostorum, a legionary town in the province of Moesia, on the site of modern Silistra in Bulgaria ^[1]. His father, Gaudentius, was a soldier of Scythian or Danubian origin who rose through the ranks to senior commands, eventually serving as master of cavalry. His mother came from a wealthy Italian family of aristocratic standing, giving the boy a foothold in both the military world of the frontier and the landed society of Italy ^[2].

Aetius entered imperial service young, enrolled among the protectores, the corps of guards that functioned as a training ground for future officers. His childhood then took an unusual turn. As part of diplomatic arrangements, he was handed over as a hostage, first to Alaric and the Visigoths for roughly three years, and afterward to the court of the Huns ^[1]. Hostage exchange of this kind was standard practice, a way of guaranteeing treaties between Rome and its neighbors.

Those years in barbarian camps shaped everything that followed. Aetius learned the languages, fighting methods, and internal politics of the very peoples who pressed hardest on the empire. He formed personal bonds with the Hunnic leadership, including the family of the future king Rua, and these friendships gave him access to Hunnic manpower that no other Roman commander could match ^[3].

The crisis of 423 CE launched his career. When the emperor Honorius died that year, a senior official named Joannes seized power in Ravenna. The Eastern court refused to recognize him and backed the child Valentinian III, son of Galla Placidia, instead. Joannes sent Aetius to the Huns to recruit an army, and Aetius returned at the head of a large force, arriving in Italy in 425 CE just days after Joannes had been captured and executed ^[2].

Rather than fight a lost cause, Aetius negotiated. He sent his Hunnic troops home in exchange for gold and secured for himself a senior military command in Gaul from the new regime ^[1]. It was a characteristic maneuver: he converted a dangerous position into an advantage through timing and the leverage of his Hunnic connections.

In Gaul he proved his worth quickly. He relieved the Visigothic siege of Arles in 426 CE, campaigned against the Franks on the Rhine, and restored a measure of Roman control in a province that had been slipping away for a generation ^[4]. Success brought rivals. Galla Placidia, ruling as regent for her young son, distrusted him and favored other generals, first Felix, who died in 430 CE after a confrontation with Aetius, and then Bonifatius, the count of Africa. In 432 CE Aetius and Bonifatius fought a pitched battle near Rimini. Aetius lost the battle, but Bonifatius died of a wound soon afterward. Aetius fled to his old friends the Huns, returned with their backing in 433 CE, and forced the court to restore him ^[2]. From that point until his death he was the effective master of the Western Empire, holding the supreme title of patrician and serving an unprecedented three consulships, in 432, 437, and 446 CE ^[1].

For most of the 430s Aetius fought a continuous defensive war to hold Gaul together. He defeated the Visigoths outside Narbonne in 436 and 437 CE, checked Frankish expansion along the Rhine, and suppressed the Bagaudae, armed bands of peasants and deserters who had rejected imperial authority in Armorica ^[4]. The chronicles of the period, thin as they are, record victory after victory under his command.

His harshest campaign fell on the Burgundians. After their king Gundahar raided the province of Belgica, Aetius crushed the kingdom in 436 and 437 CE, using Hunnic auxiliaries to destroy the Burgundian army, a catastrophe remembered and transformed centuries later in the German epic tradition of the Nibelungenlied ^[3]. In 443 CE he resettled the survivors in Sapaudia, in the region around Lake Geneva, as federate troops guarding the Alpine approaches.

Aetius could not save everything. Carthage and the rich African provinces fell to the Vandal king Geiseric in 439 CE, a loss of tax revenue and grain that permanently weakened the West, and a planned counterattack was abandoned when the Huns attacked the Eastern Empire ^[2]. His strategy narrowed to what remained: keep Gaul, keep Italy, and manage the settled barbarian peoples through a shifting mix of force, treaty, and settlement. Among the Flavius Aetius facts most cited by historians is that he accomplished this for two decades with an army that increasingly depended on the very federates he was policing.

The alliance that had sustained his career collapsed at the end of the 440s. Attila, now sole ruler of the Huns, turned his attention west, armed with a pretext supplied by the emperor's own sister Honoria, who had sent Attila a ring and an appeal that he chose to read as a marriage proposal carrying half the Western Empire as dowry ^[5]. In 451 CE Attila crossed the Rhine with an enormous coalition army and sacked a string of cities, including Metz, before laying siege to Orleans.

Aetius met the emergency by building a coalition of his own. He persuaded the Visigothic king Theodoric I, his enemy of many years, to join forces, and gathered Franks, Burgundians, Alans, and Armorican levies alongside his Roman regulars ^[4]. The combined army forced Attila back from Orleans and brought him to battle in Champagne, at a site the sources call the Catalaunian Plains or Campus Mauriacus, near Troyes.

The battle, fought in the summer of 451 CE, was among the bloodiest of the century. Theodoric was killed in the fighting, but by nightfall the allies held the field and Attila had withdrawn behind his wagon circle ^[5]. Aetius allowed the Huns to retreat across the Rhine rather than destroy them, a decision ancient writers and modern historians have debated ever since: some see calculation, since an intact Hunnic power kept the Visigoths in check, while others see simple prudence after terrible losses ^[3]. When Attila invaded Italy the following year, Aetius lacked the strength to fight a second great battle, and harassment, famine, disease, and an embassy including Pope Leo I combined to turn the Huns back. Attila died suddenly in 453 CE, and his empire disintegrated. Any account of Flavius Aetius achievements rests above all on 451: he organized the only field army that ever defeated Attila.

Aetius married at least twice. His first wife was a daughter of Carpilio, and his second was Pelagia, the widow of his old rival Bonifatius, a Gothic noblewoman who brought him considerable wealth and, according to some sources, her late husband's own recommendation ^[2]. He had a son named Carpilio, who served as an envoy and spent time at Attila's court, and a younger son, Gaudentius, whom he intended for the highest possible future.

That ambition proved fatal. Aetius arranged a betrothal between Gaudentius and Placidia, the daughter of Valentinian III, which would have bound his family directly to the imperial house ^[1]. To an insecure emperor without sons, the match looked less like an alliance than a plan of succession, and it fed the suspicions that ended the general's life.

Contemporaries left a consistent portrait of the man. The historian Priscus and the chronicler Renatus Frigeridus, quoted by Gregory of Tours, describe a lean, energetic soldier, an expert horseman and archer, indifferent to luxury, tireless under hardship, and unshaken by danger ^[3]. The picture is admiring, and it comes from writers with reasons to flatter, but nothing in his career contradicts it.

With Attila dead, Aetius seemed unassailable, and that was precisely the problem. Valentinian III had spent his entire adult life in the shadow of his general, and courtiers worked on his resentment. The senator Petronius Maximus and the chamberlain Heraclius persuaded the emperor that Aetius meant to place his own son on the throne ^[2].

On September 21, 454 CE, while Aetius was presenting a financial account at the palace in Ravenna, Valentinian leapt from his throne, accused him of treason, and struck him down with his own sword, with Heraclius joining the attack ^[1]. The general who had commanded the armies of the West for a quarter century died unarmed in a business meeting. A remark attributed to a courtier afterward, that the emperor had cut off his right hand with his left, captured the general verdict ^[5].

The consequences arrived quickly. In March 455 CE two of Aetius's former guardsmen killed Valentinian III on the Campus Martius in Rome, an act widely read as vengeance. Petronius Maximus grabbed the throne, Geiseric's Vandals sacked Rome within weeks, and the Western Empire entered the terminal spiral that ended with its dissolution in 476 CE ^[4].

Assessment of Aetius began almost immediately and has never really stopped. The sixth century historian Procopius called him the last of the Romans, a label that stuck, and Edward Gibbon later judged him the man solely responsible for propping up the Western Empire in its final generation ^[3]. Every serious Flavius Aetius biography wrestles with the same question: whether he preserved the West or merely presided over its slow surrender, trading provinces to federate kingdoms because he lacked the resources to do anything else.

Modern scholarship tends toward a middle view. Historians such as J. B. Bury and, more recently, biographers of the late Roman army credit him with an extraordinary defensive achievement, holding Gaul and Italy with dwindling revenues and a patchwork army, while noting that his power rested on the Hunnic alliance and collapsed once that alliance turned hostile ^[4]. His decision not to annihilate Attila in 451 CE remains one of late antiquity's great arguments.

His afterlife in culture is broad. He appears in the Nibelungenlied tradition through the Burgundian catastrophe he inflicted, in Giuseppe Verdi's opera Attila as the Roman general Ezio, and in modern novels and films about the Hunnic wars ^[5]. In Silistra, the Bulgarian city on the site of his birthplace, his name marks his origin on the Danube frontier that produced so many of Rome's last soldiers. The judgment of the ancient sources endures: after him, the Western Empire found no one of comparable ability, and it did not survive the search.