The Battle of Estercuel took place on 6 July 975 between the forces of the Kingdom of Viguera, under king Ramiro Garcés, and those of the Caliphate of Córdoba, under the kaid of Zaragoza, al-Tuyibi. The battle, a typical skirmish of the Christian–Muslim frontier, was a victory for the Caliphate. Several leading Navarrese magnates were killed and Ramiro was injured.