The Battle of Magetobriga (Amagetobria, Magetobria, Mageto'Bria, Admageto'Bria) is fought in 63 BCE between rival tribes in Gaul.

The Aedui tribe is 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 send envoys to the Roman Senate, their traditional ally, for aid.

The Roman general Julius Caesar will subsequently use their request for aid as a basis for entering central Gaul from his province in southern or Mediterranean Gaul.