What battle did Julius Caesar win against the Nervii in 57 BC?

Julius Caesar defeated the Nervii at the Battle of the Sabis in 57 BC. The engagement was part of the Gallic Wars and was fought against a Belgic coalition led principally by the Nervii, with support from the Atrebates and Viromandui.

The battle began disastrously for Rome. Caesar’s legions were preparing a camp when the Nervii launched a sudden attack from concealed positions near the river. The surprise was so effective that some Roman soldiers had not yet put on their helmets or uncovered their shields. The Nervii crossed the river rapidly and nearly overwhelmed the Roman line.

Caesar personally moved toward the threatened troops, while experienced legionaries held their ground. Reinforcements and coordinated counterattacks eventually turned the battle in Rome’s favour. Caesar’s account emphasizes the Nervii’s courage and describes the fight as one of the most dangerous moments of his Gallic campaign.

The river’s identity is debated. Older histories identified it with the Sambre, while modern research often places the battle near the River Selle, close to Saulzoir in northern France. This is why the battle is also sometimes called the Battle of the Sambre or the Battle against the Nervians.