 Believing that Thuir was the focus of the main French effort, Ricardos posted General Crespo and only 3,000 men to defend the Spanish right.He shifted the troops of LG Pedro Téllez-Girón, 9th Duke of Osuna and LG Luis Firmín de Carvajal, Conde de la Unión to hold Thuir.Dagobert's attack pushed back the Spanish center and forced its way into the main camp at Trouillas.