Charles spent the years that followed his great victory in regulating the government of Burgundy, where he replaced most of the counts and dukes by followers of his own, and in completing the subjection of Frisia. The peaceful duke Aldgisl had been succeeded by a fierce pagan named Boddo, whom the great mayor was soon forced to attack, when he commenced to kill or drive away the missionaries of Willibrord and Boniface. After slaying Boddo in battle, and burning every heathen shrine in Friesland, Charles left the country so tamed that it did not revolt again for full twenty years. In 735, however, new troubles began in the south. Duke Eudo died, and Charles thought the time was ripe for the complete incorporation of the great southern duchy with the Frankish realm. He rode through the land and forced its inhabitants to do him homage, but their subjection was only the result of fear, and when he had returned home the southerners proclaimed Eudo’s son Hunold as their duke. Hunold would probably have been put down had not the Saracens begun once more to stir. [Sidenote: Wars with Hunold of Aquitaine, 735-40.] Headed by Yussuf-aben-Abderahman, the son of the chief who had fallen at Poictiers four years before, they sallied out of Narbonne, crossed the Rhone, and seized the old Roman city of Arles. The years 736-39 were mainly occupied in driving back three successive Moslem inroads into south-eastern Gaul, and Charles was so engrossed in this strife that he consented to recognise Hunold as duke of Aquitaine, so that he might have his hands entirely free for the greater struggle. Complete success at last crowned his arms: Provence was swept clear of the Arabs; Arles and Avignon, which the Infidels had seized and held for a space, were recovered; Nismes, Agde, and Béziers, which they had possessed since the great invasion of Septimania in 725, were taken, dismantled, and burnt, and a great host was defeated in front of Narbonne. That city, however, did not yet fall into the hands of the Franks; together with the southern half of Septimania it still remained a Saracen outpost, covering the passes of the eastern Pyrenees. For twenty years more it was fated to remain unconquered; not Charles but his son was destined to move forward the Frankish boundary to the foot of the mountains. Meanwhile the Saracens of Spain, cowed by the crushing blows of Charles the Hammer, abandoned their attempt to push northward, and plunged into a weary series of civil wars.