 This method of succession was known from the Romans and Franks, but was a unique case among the Lombards.Perhaps because of this, a conflict broke out between Perctarit, who was based in Milan, and Godepert, who remained in Pavia.The Duke of Benevento, Grimoald, intervened with a substantial military force to support Godepert, but, as soon as he arrived in Pavia, he killed Godepert and took his place.