The next event about which information has survived is Gundobad's role concerning the Battle of Vouillé. He was one of several rulers to whom king Theoderic sent letters urging peace, and asking for mediation between Alaric II and Clovis. Despite Theoderic's best efforts, the two kings met at Vouillé, and Alaric was slain; according to Isidore of Seville, Gundobad supported Clovis in this battle. Isidore also provides a hint that Gundobad exploited the Visigothic defeat by plundering Narbonne. Delayed by the threat of the Byzantine Navy, which had been hovering off the Italian shore around the time of the battle, the Ostrogothic army arrived to relieve the Burgundian siege of Arles. According to Herwig Wolfram, the Burgundians were "the real victims of the Ostrogothic counteroffensive" following the defeat of their cousins at Vouillé. "Not only had they lost all their conquered territories and hope of acquiring Arles and Avignon but all their territory as far as Orange had been devastated."