La quiebra de la soberanía navarra en Álava, Guipúzcoa y el Duranguesado (1199-1200)

In 1200 Navarre lost Alava, Gipuzkoa and the Duranguesado area, all of which were incorporated into Castille. The military events that provoked the transfer of sovereignty is studied together with its causes, which were evident as from 1179, and which can be traced back to 1113. The rupture of the subjection of Navarre to Castille (1162) made the dispute for the Basque territories unavoidable between both kingdoms (Treaty of 1179). The rejection by Basque nobility of subsequent reforms of the Navarran kings (cities, districts or "holdings", presence of Navarran nobility) favoured their definitive inclination towards Castille.