 He reigned as duke for a little over a year.On Ado's death, at the beginning of the 8th century, the duchy passed to Ferdulf, "a slippery and arrogant man", according to Paul the Deacon, who sought easy military glory and therefore convinced some Slavs to invade his own duchy.However, the battle resulted in a Lombard defeat, due to internal division between the Duke and a nobleman called Argait.