 and his successors bore the titles “Išši’ak Aššur” (Steward of Assur) and “ensí”.The length of Naram-Sin's reign is uncertain, however; based on various excavated "limmu" (eponym) lists, Naram-Sin's and Erishum II's reigns had a combined length of 64 years.The Amorites had overrun the kingdoms of Lower Mesopotamia and the Levant between c. 2100 BC and c. 1809 BC, but had hitherto been repelled by the Assyrian kings.