Around 125 BC, the south of France is conquered by the Romans who called this region "Provincia Romana" ("Roman Province"), which evolved into the name Provence in French. Brennus' sack of Rome was still remembered by Romans, when Julius Caesar conquered the remainder of Gaul. Initially Caesar met with little Gallic resistance: the 60 or so tribes that made up Gaul were unable to unite and defeat the Roman army, something Caesar exploited by pitting one tribe against another. In 58 BC, Caesar defeated the Germanic tribe of the Suebi, which was led by Ariovistus. The following year he conquered the Belgian Gauls after claiming that they were conspiring against Rome. The string of victories continued in a naval triumph against the Veneti in 56 BC. In 53 BC, a united Gallic resistance movement under Vercingetorix emerged for the first time. Caesar laid siege to the fortified city of Avaricum (Bourges) and broke through the defenses after 25 days, with only 800 out of the 40,000 inhabitants managing to escape. He then besieged Gergovia, Vercingetorix's home town, and suffered one of the worst defeats in his career when he had to retreat to suppress a revolt in another part of Gaul. After returning, Caesar surrounded Vercingetorix at Alesia in 52 BC. The townspeople were starved into submission and Caesar's unique defensive earthworks, protruding towards the city and away from it in order to stop a massive Gallic relief force, eventually forced Vercingetorix to surrender. The Gallic Wars were over.