It was Lando who, in early 849, solicited the Emperor Louis II to arbitrate the claims of the two claimants and resolve the ongoing war which had brought Saracen mercenaries to the Mezzogiorno.
In Louis's partition, Capua was made part of the Principality of Salerno, but Lando did not long obey Siconulf his overlord.
To cement the alliance, Lando married his second-eldest son Landulf, the gastald of Suessola, to Sergius' daughter.
One of his last acts was another marital alliance, this time with Guaifer, a Salernitan nobleman who had found shelter in Capua during the reign of Adhemar.
Guaifer married Lando's daughter Landelaica and, upon returning to Capua, seized power with the support of the people.