But the next campaign of the Frankish king was one of far greater importance and success. He was set on trying his fortune against the young king of the Visigoths, whose personal weakness and unpopularity with his Roman subjects tempted him to an invasion of Aquitaine. It would seem that Chlodovech carefully chose as a _casus belli_ the Arian persecutions of Alaric, who, like his father Euric, was a bad master to his Catholic subjects. [Sidenote: Chlodovech conquers Aquitaine, 507.] A first quarrel in 504 was composed by the great Theodoric, who, as father-in-law of the Visigoth and brother-in-law of the Frank, could appeal with authority to each of the rivals. But in 507 Chlodovech declared war on the Visigoths. ‘I cannot bear,’ he said, ‘that those Arians should hold any part of Gaul. With God’s aid we will go against them, and subdue their land beneath our sway.’ Knowing the strength of the Visigothic realm, Chlodovech allied to himself for the struggle his old enemy Gundobad the Burgundian, and Sigebert of Köln, the last surviving Ripuarian king. Advancing from Paris Chlodovech crossed the Loire, and met the Visigoths and their king on the Campus Vocladensis, the plain of Vouglé, near Poictiers. Whether from cowardice, or from distrust of his own generalship, Alaric held back from fighting, but his army forced him to give battle. He attacked the Franks, was utterly defeated, and fell with the greater part of his men. So crushed were the Visigoths by the disaster that Chlodovech was able to overrun all the provinces between the Loire and the Garonne without striking another blow. He entered Bordeaux in triumph, and there spent the winter. Next spring he marched against Toulouse, the Gothic capital, and took it, and with it the great hoard of the Visigothic kings, including many of the Roman trophies that Alaric and Ataulf had carried off from Italy a hundred years before. Meanwhile, Chlodovech’s Burgundian allies overran Provence, and captured all its cities save Arles. To add to the troubles of the Visigoths they were distracted by civil strife; one party recognised as king Amalric, the infant son of Alaric, by Theodoric’s daughter, his lawful queen; the other elected Gesalic, a bastard son of Alaric, who had fortified himself in Narbonne and Barcelona. But the Franks and Burgundians drove Gesalic over the Pyrenees, and it appeared as if there was about to be an end of all Visigothic power north of those mountains.