 His son, Landulf II, allied against the Lombard principality of Salerno, but failed to oust Gisulf I.Like his father, he attacked Byzantine possessions, but was defeated and forced to submit to nominal Byzantine suzerainty.Under Landulf's sons, the union of Capua and Benevento broke down and they remained legally bound, but with Pandulf ruling separately in Capua and Landulf III in Benevento.