The Sequani then appealed to Caesar, who drove back the Germanic tribesmen (58 BCE), but at the same time obliged the Sequani to surrender all that they had gained from the Aedui. This so exasperated the Sequani that they joined in the revolt of Vercingetorix (52 BCE) and shared in the defeat at Alesia. Under Augustus, the district known as Sequania formed part of Belgica. After the death of Vitellius (69 CE), the inhabitants refused to join the Gallic revolt against Rome instigated by Gaius Julius Civilis and Julius Sabinus, and drove back Sabinus, who had invaded their territory. A triumphal arch at Vesontio (Besançon), which in return for this service was made a colony, possibly commemorates this victory.