Briefly, William Raymond had to fight a war (successfully) with Giselbert II of Roussillon over the possession of the monastery of Cuixà, which Cerdanya had controlled throughout the 10th century, but in the main, the viscounts were the greatest military detriment to the counts of Cerdanya.
Roussillon | Languedoc-Roussillon | Giselbert I of Roussillon | Giselbert II of Roussillon | Gausfred II of Roussillon | Canet-en-Roussillon |