 Innocent ordered Gaston not to intervene against the crusaders, but Gaston took part in the relief of Toulouse from the besieging army of Simon de Montfort, 5th Earl of Leicester in 1211.He also took part in the disastrous attack on Castelnaudary.However, neither of these acts were religiously based, as neither Béarn nor Bigorre had many Cathars, but grounded rather in his loyalty to Peter II of Aragon, who was forced to come to the protection of his other vassals attacked by the crusaders.