Conflicts emerging between Mojmír II and his younger brother, Svatopluk II, gave King Arnulf a pretext to send his troops to Moravia in 898 and 899. The "Annals of Fulda" writes that the "boy" Svatopluk II was rescued by Bavarian forces "from the dungeon of the city in which he was held with his men" in 899. According to Bartl, who wrote that Svatopluk II had inherited the "Principality of Nitra" from his father, the Bavarians also destroyed the fortress at Nitra on this occasion.