 Beotibar is renowned in Basque history as the site of the battle on 19 September 1321 in which Guipuzcoans defeated the Navarrese.Essentially, the battle was the result of the very complicated geopolitical forces at work in the Middle Ages that went into shaping what one day would become Spain.In 1016 boundaries had been drawn between Navarre and Castile; these boundaries made what would now be the Basque Country part of Navarre.