Before Henry II's civil war in southern Germany erupted, Otto II was faced with disputes in western Germany. The brothers Reginar IV, Count of Mons, and Lambert I, Count of Louvain, demanded that the Emperor restore their confiscated inheritance in the Duchy of Lorraine. Years earlier in 958, Otto the Great banished their father Reginar III, Count of Hainaut, to Bohemia after he attempted a failed revolt. In 973, Otto II granted their request. With both Otto the Great and Count Reginar III dead, it appears Otto II desired a fresh start with the two sons. Lambert I and Reginar IV returned to Lorraine in 973 to reclaim their land by force. After an initial failure, the brothers attempted again in 976, this time with the support of King Lothar of France. To help calm the situation in the west, Otto II appointed Charles, his cousin and brother of Lothar, as Duke of Lower Lorraine. The same year, Otto II appointed Egbert as his Imperial Chancellor.