🏺 Ancient Greece & Romehard
Battle of Alesia
52 BCE · France
Quick Facts
- Year
- 52 BCE
- Location
- France
- Era
- 🏺 Ancient Greece & Rome
- Difficulty
- hard

Caesar besieged the Gallic stronghold of Alesia by building an extraordinary double ring of fortifications—one facing inward to contain Vercingetorix's army, and another facing outward to defend against a massive Gallic relief force. Trapped between two armies, Caesar's legions held both lines and defeated both forces. Vercingetorix surrendered, ending major Gallic resistance and securing Rome's conquest of Gaul.
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Caesar's siege works at Alesia totaled about 18 kilometers of fortifications facing inward and 21 kilometers facing outward, all built in approximately three weeks by his engineering-savvy legions.