Aspects of this topic are discussed in the following places at Britannica.
The first serious attempt at establishing a chronology for the Indus civilization relied on cross-dating with Mesopotamia. In this way, Cyril John Gadd cited the period of Sargon of Akkad (2334–2279 bce) and the subsequent Isin-Larsa Period (2017–1794 bce) as the time when trade between ancient India and Mesopotamia was at its height. Calibration of the ever-growing number of...
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