Edward the Black Prince a
Edward the Black Prince arranged the Treaty of Mantes after a ruler of this state murdered Charles de la Cerda, enraging John the Good before going on to engage in no end of asshattery during the Hundred Years War. It devolved into civil war under John the Faithless, while another of its rulers often allied with Berengar the Hunchback and built it into a dominant power after succeeding a father nicknamed "the Trembler;" the power struggle of the sons of that man, called "the Great," saw this state lose at the Battle of Atapuerca under a ruler from Najera. The second rise of this homeland of Charles the Bad occurred under "The Restorer" after Alfonso the Battler tried to re-gift it to Templars; that man, Garcia, mortgaged his daughter Berengaria to Richard the Lionhearted and built up a renowned scholastic court, earning him the epithet "the Wise." It was ruled by a number of Sanchos, including "the Fat," who fought at Las Navas de Tolosa along with Alfonso VIII of Castile and Pedro II of Aragon. For 10 points, identify this kingdom in the Pyrenees once known as Pamplona, whose ruler Henry III went on to become Henry IV of France.
Edward the Black Prince arranged the Treaty of Mantes after a ruler of this state murdered Charles de la Cerda, enraging John the Good before going on to engage in no end of asshattery during the Hundred Years War.
{Navarre} or {Navarra} (accept {Pamplona} before mentioned; accept {Nafarroako} from {ETA homeboy})