Shamshi-Adad I had not returned until he had taken Ekallatum, after which he had paused for three years and then had overthrown Erishum II. The Mari Eponym Chronicle, which resumes the listing until the seizure of Ekallatum by Shamshi-Adad I, provides no clue as to when the succession of Erishum II had taken place. As the reign of Erishum II was prematurely ended by the conquests of Shamshi-Adad I, it is likely that Naram-Sin's reign was the greater part of the period, additionally; the broken figure on the Nassouhi King List ends on four, so perhaps Naram-Sin reigned 44 or 54 years (c. 1872 BC onward, middle chronology.)
Shamshi-Adad I had not returned until he took Ekallatum, after which he waited for three years before toppling Erishum II. The Mari Eponym Chronicle only provides information on events prior to Shamshi-Adad I's capture of Ekallatum. As the reign of Erishum II was terminated by Shamshi-Adad I's military campaigns, it is likely that Naram-Sin's reign was the primary period in question. Additionally, considering the incomplete figure on the Nassouhi King List, which ends at four, perhaps Naram-Sin reigned for 44 or 54 years (c. 1872 BC onward, middle chronology).