 After Louis was defeated by his rival, Berengar I, in 902, Adalbert changed sides.Shortly thereafter, by 903 at the latest, he married Gisela of Friuli, Berengar's daughter, which was possibly the price of his allegiance.Although Adalbert is not recorded as being related to the king in any of Berengar's charters down through 14 August 908 and his marriage is not explicitly referenced before 13 June 910, it must have taken place some fifteen years before he and Gisela's eldest son was sent was granted a county and a "missaticum" in 918.