 In early 367 Valentinian was distracted from launching a punitive expedition against the Alamanni due to crises in Britain and northern Gaul.The Alamanni promptly re-crossed the Rhine and plundered Moguntiacum.Valentinian succeeded in arranging the assassination of Vithicabius, an Alamannic leader, but Valentinian was more determined to bring the Alamanni under Roman hegemony.