 Angry at the Castilian takeover of the ecclesiastic, administrative, and judicial institutions in Navarre, the Navarrese rose up in support of Henry II on hearing the news of Henry II's expedition.Volunteer bands were created in many places to expel the Castilians.As the Franco-Navarrese army approached Pamplona, the citizens revolted and besieged the Castilian military governor, Ignatius of Loyola, in his newly-built castle.