 The Castilian Viceroy of Navarre, Antonio Manrique de Lara, 2nd Duke of Nájera, was caught off-guard.The Duke was responsible for guarding the Navarrese lands conquered in 1512, but he had moved the bulk of his troops away from Navarre to suppress the Revolt of the Comuneros in his home territory of Castile.Rumors of a "French" invasion had been widespread, with former comunero noble Pedro Girón warning of the impending invasion in April 1521.