Нарам-Суэн
With these defeats, the low-lying, westerly parts of Elam became a vassal of Akkad, centred at Susa. This is confirmed by a document of great historical value, a peace treaty signed between Naram-Sin of Akkad and an unnamed king or governor of Awan, probably Khita or Helu. It is the oldest document written in Elamite cuneiform that has been found.