of war. The prosperity of Mediterranean Gaul encouraged Rome to respond to pleas for assistance from the inhabitants of Massilia, who found themselves under attack by a coalition of Ligures and Gauls. The Romans intervened in Gaul in 154 BC and again in 125 BC. Whereas on the first occasion they came and went, on the second they stayed. In 122 BC Domitius Ahenobarbus managed to defeat the Allobroges (allies of the Salluvii), while in the ensuing year Quintus Fabius Maximus "destroyed" an army of the Arverni led by their king Bituitus, who had come to the aid of the Allobroges. Rome allowed Massilia to keep its lands, but added to its own territories the lands of the conquered tribes. As a direct result of these conquests, Rome now controlled an area extending from the Pyrenees to the lower Rhône river, and in the east up the Rhône valley to Lake Geneva. By 121 BC Romans had conquered the Mediterranean region called Provincia (later named Gallia Narbonensis). This conquest upset the ascendancy of the Gaulish Arverni peoples. Conquest by Rome The Roman proconsul and general Julius Caesar pushed his army into Gaul in 58 BC, ostensibly to assist Rome's Gaullish allies against the migrating Helvetii. With the help of various Gallic clans (e.g. the Aedui) he managed to conquer nearly all of Gaul. While their military was just as strong as the Romans', the internal division between the Gallic tribes guaranteed an easy victory for Caesar, and Vercingetorix's attempt to unite the Gauls against Roman invasion came too late. Julius Caesar was checked by Vercingetorix at a siege of Gergovia, a fortified town in the center of Gaul. Caesar's alliances with many Gallic clans broke. Even the Aedui, their most faithful supporters, threw in their lot with the Arverni but the ever-loyal Remi (best known for its cavalry) and Lingones sent troops to support Caesar. The Germani of the Ubii also sent cavalry, which Caesar equipped with Remi horses. Caesar captured Vercingetorix in the Battle of Alesia, which ended the majority of Gallic resistance to Rome. As many as a million people (probably 1 in 5 of the Gauls) died, another million were enslaved, 300 clans were subjugated and 800 cities were destroyed during the Gallic Wars. The entire population of the city of Avaricum (Bourges) (40,000 in all) were slaughtered. Before Julius Caesar's campaign against the Helvetii (Switzerland), the