 Later, Lugal-Zage-Si, the priest-king of Umma, overthrew the primacy of the Lagash dynasty in the area, then conquered Uruk, making it his capital, and claimed an empire extending from the Persian Gulf to the Mediterranean.He was the last ethnically Sumerian king before Sargon of Akkad.The Akkadian Empire dates to c. 2270–2083 BC (short chronology).