Gallia Christiana | Musica Transalpina | ''Italia Gallica sive Gallia Cisalpina'' (Abraham Ortelius | Gallia christiana |
When consul in 121 BC he campaigned in Gallia Transalpina (in the modern day Auvergne and Rhône-Alpes regions) with Gnaeus Domitius Ahenobarbus against the Gallic tribes of the Allobroges and Arverni whom he defeated.
The Volcae Arecomici of their own accord surrendered to the Roman Republic in 121 BC, after which they occupied the Roman province of Gallia Narbonensis (the area around modern day Narbonne), the southern part of Gallia Transalpina.