The Battle of Atapuerca is fought on September 1, 1054 at the site of Piedrahita ("standing stone") in the valley of Atapuerca between two brothers, King García Sánchez III of Navarre and King Ferdinand I of Castile.The Castilians win and King García and his favorite, Fortún Sánchez, are killed in battle.
Ferdinand reannexesNavarrese territory he conceded to García 17 years earlier after his brother's assistance at Pisuerga.
