Did a Roman general ambush the Goths on a mountain known as Snake Mountain?
In 438, the Roman commander Aetius secured a decisive victory against the Visigoths at the mysterious Mons Colubrarius. Known only through a poetic panegyric, the battle was not a standard clash of armies, but a surprise attack that left thousands dead and forced a major setback for King Theodoric I.
The Battle of Mons Colubrarius occurred during the Gothic War of 436–439, a period of intense conflict between the Western Roman Empire and the Visigoths. While the war saw shifting fortunes—including a Roman offensive led by Litorius in 437—the engagement at Mons Colubrarius stands out as a unique tactical success for the Roman general Aetius. Unlike conventional battles where two armies meet on a field, this encounter was a surprise strike executed while King Theodoric I was temporarily absent from his main force.
Our primary knowledge of this event comes from a panegyric written by the court poet Merobaudes, delivered in 438 to celebrate a statue of Aetius commissioned by Emperor Valentinian III. The poet describes Aetius surprising the Gothic forces on 'Snake Mountain,' slaughtering the infantry and pursuing the cavalry with relentless speed. When Theodoric finally arrived with his remaining troops, he was reportedly stunned to find the battlefield covered in the bodies of his soldiers. Historians like Ian Hughes suggest this account, while likely exaggerated for the sake of the hymn, reflects a genuine and significant military defeat for the Goths.
The exact location of the battle remains a subject of historical debate, though a compelling theory points to the French village of Olonzac. A 12th-century manuscript links the site to a location called 'Petra Colobram,' which translates to Snake Mountain. The text recounts a later battle involving Charlemagne, where a character identifies the hill as the future Roc de la Garde Roland. Despite the severity of the defeat at Mons Colubrarius, the victory was not final; Theodoric refused to capitulate, and the war dragged on until 439, illustrating the persistent instability of the era.
The account serves as a reminder of how ancient history is often filtered through the lens of political propaganda. Because the only surviving record is a celebratory poem, the reported figure of 8,000 slain Goths must be viewed with skepticism. Nevertheless, the battle remains a pivotal moment in the career of Aetius, who was honored for his role in checking Gothic expansion during a volatile period of the fifth century.
Source: Battle of Mons Colubrarius
