Prior to the battle, Caesar and Ariovistus held a parley. Ariovistus' cavalry cast stones and weapons at the Roman cavalry. Caesar broke off negotiations and instructed his men not to retaliate to prevent the Suebi from claiming they were induced into a trap by their accepting an opportunity to talk.

The next morning Caesar assembled his allied troops in front of the second camp and advanced his legions in triplex acies (three lines of troops) towards Ariovistus. Each of Caesar's five legates and his quaestor were given command of a legion. Caesar lined up on the right flank. Ariovistus countered by lining up his seven tribal formations. Caesar was victorious in the battle that ensued due in large part to the charge made by Publius Crassus. As the Germanic tribesmen began to drive back the Roman left flank, Crassus led his cavalry in a charge to restore balance and ordered up the cohorts of the third line. As a result, the whole Germanic line broke and began to flee. Caesar claims that most of Ariovistus' one-hundred and twenty thousand men were killed. He and what remained of his troops escaped and crossed the Rhine, never to engage Rome in battle again. The Suebi camping near the Rhine returned home. Caesar was victorious.

The Battle of Vosges is the third major battle of the Gallic Wars. Germanic tribes crossed the Rhine, seeking a home in Gaul.