Key Facts
- Duration of siege
- Seven months
- Modern location
- Autun, Burgundy, eastern France
- Gallic Emperor at time
- Victorinus
- Roman Emperor opposing
- Claudius Gothicus
- Result for city
- Plundered and destroyed by Victorinus' troops
Strategic Narrative Overview
Victorinus marched south and laid siege to Augustodunum Haeduorum. Despite the city's open declaration for Claudius Gothicus, the Roman emperor sent no relief force. The siege lasted seven months, during which the defenders held out without external support. The city's isolation proved decisive, and it eventually fell to Victorinus' forces, who proceeded to sack and destroy it, demonstrating the brutal consequences of defection within the unstable Gallic realm.
01 / The Origins
In late 269, Victorinus was proclaimed emperor by troops at Augusta Treverorum, but his rule over the breakaway Gallic Empire was immediately contested. Hispania defected to the Roman Emperor Claudius Gothicus, who dispatched his general Placidianus into Gaul. After Placidianus seized Cularo, the strategically important city of Augustodunum Haeduorum was emboldened to renounce Victorinus and declare loyalty to Claudius, fracturing Gallic imperial authority and compelling Victorinus to respond militarily.
03 / The Outcome
Augustodunum Haeduorum was plundered and laid waste following its capture. Victorinus' victory proved short-lived, as he was assassinated shortly after the siege concluded, further destabilising the Gallic Empire. Claudius Gothicus, having provided no military aid to the city, nonetheless benefited from the chaos surrounding Victorinus' death. The episode underscored the limits of Gallic imperial power and the precarious loyalty of provincial cities during the Crisis of the Third Century.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Victorinus.
Side B
1 belligerent
Placidianus.
Kinetic Engagement Axis
Scroll horizontally to view full axis. Events plotted relatively.