 Some Celts, including perhaps the Helvii and Volcae Arecomici, supported Sertorius.After the renegade Roman was assassinated, Metellus and Pompeius were able to declare a victory, and the Helvii and Volcae were forced to cede a portion of their lands to the Greek city-state Massilia (present-day Marseilles), a loyal independent ally of Rome for centuries, located strategically at the mouth of the river Rhône and the staunch supporter of Pompeius.During Caesar's Gallic Wars, none of the Gallic "civitates" within the Narbonese province joined the pan-Gallic rebellion of 52 BC, nor engaged in any reported acts of hostility against Roman forces.