After he attained his majority, he commended his duchy to Pepin the Short, King of the Franks, probably at the coaxing of Pope Stephen II, and rebelled against King Desiderius, being deposed in 758 to be replaced by Arechis II.
Despois de que acadou a maioría de idade, encomendou o seu ducado a Pipino o Breve, rei dos francos, probabelmente impulsado polo papa Estevo II, e rebelouse contra o rei Desiderio, deposto en 758 e substituído por Arechis II.