Bibracte (Gallic War).
Fought B.C. 58, between the Romans under Cæsar and a largely superior force of Helvetii. The battle was a momentous one, for a defeat to Cæsar meant destruction. He therefore sent away all his officers' horses, giving them to understand that they must stand their ground to the last. In the event, the Helvetii were totally routed, and compelled to submit to the domination of Rome.