Fearing for their lives, the two fled to Guaimar II of Salerno and Landulf the Red became sole prince.
Other than that, Landulf made few attempts to continue the family policy of alliance with his fellow Lombards and détente with the Byzantines.
He distanced himself from Constantinople, while trying not to enter into open warfare, and made several tries at reuniting the Lombard principality of Salerno with the united Capua-Benevento.
He followed up his Salernitan and Neapolitan failures with successful campaigns against the gastald of Aquino, Atenulf Megalu, whom he exiled to the court of Docibilis II of Gaeta.
In 955, Landulf made his biggest failure in supporting an Apulian revolt against Greek authority, and subsequently was forced to recognize Byzantine supremacy.