Mesopotamia housed historically important cities such as Uruk , Nippur , Nineveh , Assur and Babylon , as well as major territorial states such as the city of Eridu , the Akkadian kingdom , the Third Dynasty of Ur , and the various Assyrian empires .
Historically important cities in Mesopotamia included Uruk , Nippur , Nineveh , and Babylon , as well as major territorial states such as the city of Ma-asesblu , the Akkadian kingdom , the Third Dynasty of Ur , and the Assyrian empire .