Who were the rulers of Mesopotamia?

According to the generally accepted definition of Mesoptamia as the land between the Euphrates and Tigris, the history can be charted approximately as follows: ~3000 BCE - Loose conglomeration of Sumerian city-states, each with its own king. The stories about Gilgamesh take place in this time frame. ~2300 - Sargon of Akkad starts the Akkadian empire with Akkad as its capital city (whereabouts still unknown). 2200-1800 - Ruled by kings in Larsa, Isin, and then Ur. Various city-states vied for power. ~1800 BCE - Old Babylonian empire starts under Hammurabi. ~1400 BCE - Middle Babylonian/Assyrian empires ~1000-612 BCE - Neo-Assyrian Empire (Sennacherib, Esarhaddon, Ashurbanipal, etc.) 612-520 BCE - Neo-Babylonian Empire (Nebuchanezzar II, Nabonidis, etc.) 520-331 BCE - Persian Empire (Cyrus the Great, Darius, etc) 331- Macedonian conquest under Alexander the Great That's it for Ancient Mesopotamia. After that it stops being its own entity under really modern times, and now it's known as Iran.