In 968, his uncle Landulf III died and this was the occasion of his rise, as Pandulf ignored the rights of Landulf's son Pandulf, his nephew, and instead associated his own son with the government.
En 968, morreu o seu tío Landulfo III e esa foi a ocasión do seu ascenso, Pandulfo ignorou os dereitos do fillo de Landulfo Pandulfo, o seu sobriño, e no canto del asociou ao seu propio fillo ao goberno.