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War of the Three Sanchos

War of the Three Sanchos
Navaro-dum-1037.png
  •   Castile
  •   Navarre
  •   Aragon (1037)
Date 1065 – 1067
Location Iberian Peninsula
Result Castilian victory
Territorial
changes
Castile annexes La Bureba, Montes de Oca and Pancorbo
Belligerents
Royal Banner of the Crown of Castille (15th Century Style)-Variant.svg Kingdom of Castile Bandera de Reino de Navarra.svg Kingdom of Navarre
Royal Banner of Aragón.svg Kingdom of Aragon
Commanders and leaders
Royal Banner of the Crown of Castille (15th Century Style)-Variant.svg Sancho II of Castile Bandera de Reino de Navarra.svg Sancho IV of Navarre
Royal Banner of Aragón.svg Sancho of Aragon

The War of the Three Sanchos (Spanish: Guerra de los Tres Sanchos) was a brief military conflict between three Spanish kingdoms in 1065–1067. The kingdoms were all ruled by Jiménez kings who were first cousins: Sancho II of Castile, Sancho IV of Navarre, and Sancho Ramírez of Aragon, all grandsons of Sancho the Great. The primary source for the war is the thirteenth-century Primera crónica general.

The brief war was ignited in part by the strife left over from the division of the kingdom of Sancho the Great in 1035. That division had left Navarre with a supremacy over the "petty kingdoms" (regula) of Castile and Aragon, but by 1065 Navarre was a vassal of Castile (now joined with the Kingdom of León). In 1065 Ferdinand the Great, the Castilian monarch died and his kingdom was divided between his sons, with the eldest, Sancho, taking Castile. Sancho of Castile was covetous of the lands of Bureba and Alta Rioja. Ferdinand had helped reconquer them from the Caliphate, but then had ceded them to his elder brother García Sánchez III of Navarre, the father of Sancho IV.

After an initial series of frontier raids, Sancho IV of Navarre asked for an alliance from Sancho Ramírez of Aragon. Most of the war took place in the region of Burgos and La Rioja. The war was also fought over Castile's ability to take part in the Reconquista, a capacity which had been diminished by the division of Ferdinand's kingdom in 1065. Sancho of Castile did try to extend his influence over the Muslim taifa of Zaragoza, which owed him parias. According to the twelfth-century Crónica Najerense, a battle was fought during which campaign his alférez, Rodrigo Díaz de Vivar, defeated his Navarrese counterpart, Jimeno Garcés, and gained the nickname campi doctor or "master of the field [of battle]", later to become famous in Spanish literature as el Campeador.


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