After the defeat of Pressburg in 907, resulting in the death of his father Luitpold, and of a big part of the Bavarian elite, the new duke of Bavaria, Arnulf, tried to shape a modus vivendi with the Hungarians, which consisted in paying a tribute to them, letting their armies cross his lands when they went to attack other countries, and using their help to defeat his enemies. When in 914, he was chased away by the East Francian king Conrad I from his throne, he with his family retreated to Hungary, and, after an unsuccessful attempt in 916, he regained his duchy with Magyar's help in 917. This occurred while the Hungarians, continuing their campaign towards West, occupied and burned Basel, a city which was, several months before, captured by Conrad I from the supporters of Arnulf and his ally, Burchard II, Duke of Swabia. Conrad was an enemy of the Hungarians, trying to oppose them, and was really angered by the alliance between his stepson (he was married with Arnulf's mother, Kunigunde) and the Hungarians, and by the fact, that he, instead of stopping them on his borders, he let them to cross unharmed, every time when they started a campaign to West. So, this was one of the causes of the hostility between the king and the duke. After Arnulf came back with his family, and took back his throne, Conrad again attacked Bavaria, but was defeated and wounded by Arnulf in a battle, and died on 23 December 918.