How a surprise night raid near Dibaltum shattered Roman defenses in the summer of 377
In the summer of 377, a Roman force stationed in Thrace faced a sudden, devastating defeat. After the withdrawal of troops from the Haemus Mountains, a coalition of Goths, Huns, and Alans swept through the countryside, catching Roman commanders off guard and effectively dismantling their military presence near the city of Dibaltum.
The conflict began after Saturninus ordered a strategic withdrawal from the Haemus Mountains, inadvertently opening a path for Gothic forces to move from Moesia into Thrace. Seeking plunder, a combined army of Goths, Huns, and Alans traveled south from the region of Marcianopolis. They eventually arrived near Dibaltum, where the Roman commander Barzimeres, the tribunum scutariorum, had recently established a camp alongside units of scutarii cavalry and cornuti infantry.
The engagement started when the invaders surprised the Romans while they were setting up their night camp. Barzimeres attempted to organize a defensive formation, launching an immediate counter-attack to push the enemy back. The skirmish seemed destined to continue until nightfall, but the arrival of a massive cavalry contingent shifted the momentum. This fresh force surrounded the Roman ranks, leading to the total destruction of the army. During the chaos, Barzimeres was killed in action, and Equitius, the cura palatii, was taken prisoner.
Following this victory, the coalition proceeded to sack Dibaltum. Their next target was the general Frigeridus, who was stationed at Beroea. However, Frigeridus’s scouts identified the approaching threat in time, allowing him to retreat safely to Illyria. While the Roman military suffered a catastrophic loss at Dibaltum, the captured Equitius eventually managed to escape his captors. This battle remains a stark example of the tactical volatility during the Gothic War, highlighting the dangers of Roman overextension and the effectiveness of mobile, multi-ethnic tribal forces in the late fourth century.
Source: Battle of Dibaltum
