the spring and fall of 938, Otto defeated and exiled Eberhard from the kingdom and stripped him of his titles. In his place, Otto appointed Eberhard's uncle Berthold, a count in the March of Carinthia, as the new Duke of Bavaria on the condition that Berthold would recognize Otto as the sole authority to appoint bishops and to administer royal property within the duchy. At the same time, Otto had to settle a dispute between Bruning, a Saxon noble, and Duke Eberhard of Franconia, the brother of the former king Conrad I of Germany. After the rise of a Saxon to kingship, Bruning, a local lord with possessions in the borderland between Franconia and Saxony, refused to swear fealty to any non-Saxon ruler. Eberhard attacked Bruning's Helmern castle near Peckelsheim, killed all of its inhabitants and burned it down. The king called the feuding parties to his court at Magdeburg, where Eberhard was ordered to pay a fine, and his lieutenants were sentenced to carry dead dogs in public, which was considered a particularly shameful punishment. Infuriated with Otto's actions, Eberhard joined Otto's half-brother Thankmar, Count Wichmann, and Archbishop Frederick of Mainz and rebelled against the king in 938. Duke Herman I of Swabia, one of Otto's closest advisors, warned him of the rebellion and the king moved quickly to put down the revolt. Wichmann was soon reconciled with Otto and joined the king's forces against his former allies. Otto besieged Thankmar at Eresburg and had him killed at the altar of the Church of St. Peter. Following their defeats, Eberhard and Frederick sought reconciliation with the king. Otto pardoned both after a brief exile in Hildesheim and restored them to their former positions. War in France Shortly after his reconciliation, Eberhard planned a second rebellion against Otto. He promised to assist Otto's younger brother Henry in claiming the throne and recruited Gilbert, Duke of Lorraine, to join the rebellion. Gilbert was married to Otto's sister Gerberga of Saxony, but had sworn fealty to King Louis IV of West Francia. Otto exiled Henry from East Francia, and he fled to the court of King Louis. The West Frankish king, in hopes of regaining dominion over Lorraine once again, joined forces with Henry and Gilbert. In response, Otto allied with Louis's chief antagonist, Hugh the Great, Count of Paris, and husband of Otto's sister Hedwige. Henry captured Merseburg and planned to