Allegedly, Pierre-Roger advised Trencavel to remain in the castrum rather than meet the crusader army in the open field, because he was outnumbered. After Raimond-Roger surrendered Carcassonne, Pierre-Roger managed to return to his own castles.
He successfully defended his castles against Simon de Montfort, 5th Earl of Leicester, but months later capitulated without military actions. He abandoned the Cabaret castles, but was granted lands near Beziérs in return.
Dominique Paladilhe, Simon de Montfort, Librairie Académique Perrin, 1988 (réimpr. 1997), p. 324 (ISBN 2-262-01291-1)
Georges Bordonove, La Tragédie Cathare, Paris, Pygmalion – Gérard Watelet, coll. "Les Grandes Heures de l’Histoire de France", 1991, p. 462 (ISBN 2-85704-359-7)
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