 In 919 the West Frankish barons refused to assist the king in repelling a Magyar invasion.One of the leading Lotharingian barons, Gilbert, threw his support behind Henry the Fowler, the German king, and, according to Flodoard, was elected "prince" ("princeps") by the Lotharingian aristocracy.Flodoard also records that Robert of Neustria made a treaty with the Vikings without royal permission.