Excavations conducted by Jean-Claude Margueron were done during the construction of a dam on the Euphrates from 1972 to 1976. They permitted the discovery of an old city, with many writing tablets in Akkadian cuneiform. Their translation helped to understand that the unearthed town was called Emar, country of Astata.
Since 1996, excavations are continuing with a mixed team, German and Syrian.
The ruins found were dated to the fourteenth century BC. Yet the texts of Ebla and Mari mention Emar at the end of the third millennium. But this ancient town was not found. Only the city contemporary to Suppiluliuma - and some of his successors, including Šahurunuwa and Ini-Teshub kings of Carchemish - was exhumed, at a place called Meskene-Khadimé, on a small hill along the Euphrates. The choice of location is a feature of the Hittites, who preferred always ensure the defenses of a town.
The Alalakh tablets mention Emar during two production periods: the eighteenth century BC and the fifteenth century BC.
The ancient city of Emar was characterized by its strategic geographical position and its religious cults: several translated texts are ritual descriptions. The life was under the control of a soothsayer, who was one of the most influential and richest men in the city.
Other tablets are legal acts: wills and purchases of houses.
My notes of veracity :
Meskene-Khadimé was the city designated "Emar" in Akkadian: 5/5