 This small army aimed at reaching Sanguesa and Lumbier, and there inciting an uprising against the Castilians.The first column led by John III failed to overcome the Castilian garrison occupying St-Jean-Pied-de-Port, while the second was no more successful.Pedro advanced towards Roncevaux on 12March 1516, but Cardinal Cisneros had been informed of the Navarrese intentions and had Colonel Villalba awaiting him at Roncevaux.