Battle of Tafalla
1043 CE.
Shown on the map at 42.517°, -1.667°.
At the Battle of Tafalla, García Sánchez III of Navarre defeated his brother, Ramiro I of Aragon, who was invading his kingdom, near Tafalla. Allied with García was his brother Ferdinand I of Castile, and Ramiro brought with him his Moorish allies, the kings of the taifas of Zaragoza, Tudela, and Huesca. According to the earliest source, the Historia Silense, the battle took place in 1035, but in the early modern period the Navarrese historian José de Moret re-dated it to 1043 on the basis of a document of that year by which García granted his alférez Fortún Sánchez the village of Ororbia in gratitude for a black horse which Sancho had given him and which the king had used in the battle of Tafalla. The Historia places the battle shortly after the death of García and Ramiro's father, Sancho the Great (18 October 1035), while García was returning from a pilgrimage to Rome. Taking advantage of his brother's absence, Ramiro is said to have invaded Navarre with the intention of expanding his own Kingdom of Aragon or seizing García's throne, despite his vow to his father to maintain peace with his brothers.
Text from the Wikipedia article Battle of Tafalla, licensed CC BY-SA 4.0.