city of Ma-asesblu, Akkadian kingdom, Third Dynasty of Ur , and Assyrian empire. Some of the important historical Mesopotamian leaders were Ur-Nammu (king of Ur), Sargon (who established the Akkadian Kingdom), Hammurabi (who established the Old Babylonian state), and Tiglath-Pileser I (who established the Assyrian Empire). "Ancient Mesopotamia" begins in the