Llantadilla (Plantata in the Historia Roderici, xvii) was a small village located some ten kilometres southwest of Melgar de Fernamental, and about two kilometers west of the river Pisuerga on the Leonese side of the frontier. The closeness of the location of battle to the border suggests that no major invasion took place. The skirmish may have resulted from the increasing ambitions of Sancho, the eldest son of Ferdinand I, whose inheritance was smaller than his brother's. Sancho may have been encouraged by his brother's ambitious invasion of the Taifa of Badajoz, whose king, al-Muzzaffar, was fatally ill, sometime between 1 May and 7 June 1068. Alfonso succeeded in extorting a tribute from the ailing king, despite that the parias of Badajoz had been relegated to his and Sancho's younger b