The Roman Republic's influence began in southern Gaul. By the mid-2nd century BC, Rome was trading heavily with the Greek colony of Massilia (modern Marseille) and entered into an alliance with them, by which it agreed to protect the town from local Gauls, including the nearby Aquitani and from sea-borne Carthaginians and other rivals, in exchange for land that it wanted in order to build a road to Hispania, to assist in troop movements to its provinces there. The Mediterranean settlements on the coast continued to be threatened by the powerful Gallic tribes to the north and in 122 BC the Roman general Gnaeus Domitius Ahenobarbus campaigned in the area and defeated the Allobroges followed by Quintus Fabius Maximus against the Arverni under King Bituitus in 121 BC.