[1] Left tributary of the Rhodanus
Left tributary of the Rhodanus, modern Isère, has its source in the Alpes Graiae as a mountain stream (torrens: Plin. HN 3,33; maximum flumen: Cic. Fam. 10,15,3) and flows through the territory of the Allobroges. In 218 BC Hannibal marched upstream from the confluence of the I. and the Rhodanus (Pol. 3,49; Liv. 21,31). It was here that Q. Fabius Maximus beat the Arver…