Yamhad (modern Aleppo) dominated northern Syria for two centuries, although Eastern Syria was occupied in the 19th and 18th centuries BC by the Old Assyrian Empire ruled by the Amorite Dynasty of Shamshi-Adad I, and by the Babylonian Empire which was founded by Amorites. Yamhad was described in the tablets of Mari as the mightiest state in the near east and as having more vassals than Hammurabi of Babylon. Yamhad imposed its authority over Alalakh, Qatna, the Hurrians states and the Euphrates Valley down to the borders with Babylon. The army of Yamhad campaigned as far away as Dēr on the border of Elam (modern Iran). Yamhad was conquered and destroyed, along with Ebla, by the Indo-European Hittites from Asia Minor circa 1600 BC.