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The place was originally called Aurag, meaning source in the Mongolian language. Avraga or Avarga is located near the place where Genghis Khan's family lived. Oral tradition maintains that Börte and other family members continued to live in Avarga during the Mongol invasion of Khorazm (1218–1223). It was a collection and distribution center for goods from around the empire; but it soon proved too small and the Mongol court established the base of Karakorum.