ブーヴィーヌの戦い
In 1214, at the Battle of Bouvines, Déodat, known as Tristan, was said to have saved the life of King Philippe Auguste and given him his horse. In recognition, the king gave Déodat the right to adopt the arms of France, keeping the golden chief that covered his former arms. Recent historians have not been able to confirm the veracity of this legend.