The maritime trading of the 3rd and early 2nd millennia BC between Mesopotamia and Dilmun, Magain, and Meluhha. The busiest Mesopotamian sites were Lagash and Ur and the other three places' names are known from cuneiform texts. Combined with archaeological information, it has been determined that Dilmun corresponds to the Barbar culture of the Persian Gulf, Magain relates to Umm an-Nar in southwest Arabia, and Meluhha is identified with the Harappan culture area.