King Philip IV's death set in motion the specific events that would begin the Hundred Years War. In France the unbroken line of the Direct Capetian firstborn sons had succeeded each other for centuries. It was the longest continuous dynasty in medieval Europe. In 1314, the Direct Capetian, King Philip IV, died, leaving three male heirs: Louis X, Philip V, and Charles IV. The eldest son and heir, Louis X, died in 1316, leaving only his posthumous son John I, who was born and died that same year, and a daughter Joan, whose paternity was suspect. one of Philip IV's dauthers, Isabell, was married to Edward II, and was mother to Edward III, who claimed the French throne and began the Hundred Years war.