The Battle of Magetobriga (Amagetobria, Magetobria, Mageto'Bria, Admageto'Bria) was fought in 63 BC between rival tribes in Gaul. The Aedui tribe was defeated and massacred by the combined forces of the Sequani and Arverni tribes, who had enlisted the aid of the German Suebi tribe under the Germanic king Ariovistus. Following their defeat, the Aedui sent envoys to the Roman Senate, their traditional ally, for aid. The Roman general Julius Caesar would subsequently use their request for aid as a basis for entering central Gaul from his province in southern or Mediterranean Gaul.