The influence of Hatto and the consent of Otto placed Conrad, Duke of Franconia, on the imperial throne. Sprung from a newly risen family, a mere creature of the bishop, his nobility as a feudal lord only dating from the period of the Babenberg feud, he was regarded by the Church as a pliable tool and by the dukes as little to be feared. His weakness was quickly demonstrated by his inability to retain the rich allods of the Carlovingian dynasty as heir to the imperial crown, and his being constrained to share them with the rest of the dukes; he was, nevertheless, more fully sensible of the dignity and of the duties of his station than those to whom he owed his election probably expected. His first step was to recall Regingar of Lothringia, who was oppressed by France, to his allegiance as vassal of the empire. Otto died in 912, and his son Henry, a high-spirited youth, who had greatly distinguished himself against the Slavi, ere long quarrelled with the aged bishop Hatto. According to the legendary account, the bishop sent him a golden chain so skilfully contrived as to strangle its wearer. The truth is that the ancient family feud between the house of Conrad and that of Otto, which was connected with the Babenbergers, again broke out, and that the Emperor attempted again to separate Thuringia, which Otto had governed since the death of Burkhard, from Saxony, in order to hinder the overpreponderance of that ducal house. Hatto, it is probable, counselled this step, as a considerable portion of Thuringia belonged to the diocese of Mayence, and a collision between him and the duke was therefore unavoidable. Henry flew to arms, and expelled the adherents of the bishop from Thuringia, which forced the Emperor to take the field in the name of the empire against his haughty vassal. This unfortunate civil war was a signal for a fresh irruption of the Slavi and Hungarians. During this year the Bohemians and Sorbi also made an inroad into Thuringia and Bavaria, and in 913 the Hungarians advanced as far as Swabia, but being surprised near Oetting by the Bavarians under Arnulf, who on this occasion bloodily avenged his father's death, and by the Swabians under the kammerboten Erchanger and Berthold, they were all, with the exception of thirty of their number, cut to pieces. Arnulf subsequently embraced a contrary line of policy, married the daughter of Geisa, King of Hungary, and entered into a confederacy with the Hungarian and the Swabian kammerboten, for the purpose of founding an independent state in the south of Germany, where he had already strengthened himself by the appointment of several markgrafs, Rudiger of Pechlarn in Austria, Rathold in Carinthia, and Berthold in the Tyrol. He then instigated all the enemies of the empire simultaneously to attack the Franks and Saxons, at that crisis at war with each other, in 915, and while the Danes under Gorm the Old, and the Obotrites, destroyed Hamburg, immense hordes of Hungarians, Bohemians,