ベレンガーリオ2世
Peace in Italy, however, would not last long. Adalbert, the son of the deposed King Berengar II of Italy, rebelled against Otto's rule over the Kingdom of Italy. Otto dispatched Burchard III of Swabia, one of his closest advisors, to crush the rebellion. Burchard III met Adalbert at the Battle of the Po on 25 June 966, defeating the rebels and restoring Italy to Ottonian control. Pope Leo VIII died on 1 March 965, leaving the chair of St. Peter vacant. The Church elected, with Otto's approval, John XIII as new Pope in October 965. John XIII's arrogant behavior and foreign backing soon made him disliked among the local population. In December of the same year, he was taken into custody by the Roman people but was able to escape a few weeks later. Following the Pope's request for help, the Emperor prepared his army for a third expedition into Italy.