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2900 BCE
2800 BCE
2700 BCE
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2900 BCE - 2334 BCE: Warfare rages between Sumerian city-states during the Early Dynastic Period.
2700 BCE: First recorded war in history between Sumer and Elam; Sumer wins.
2600 BCE: Stele of the Vultures monument celebrates victory of Lagash over Umma.
2500 BCE: Oldest helmet in the world - the "Golden Wig" - worn by Sumerian commander.
2334 BCE - 2279 BCE: Sargon of Akkad reforms the military, disbands militias, and creates a professional standing army.
2047 BCE - 1750 BCE: The kings of the Ur III Period build on Sargon's military model.
1792 BCE - 1750 BCE: Hammurabi of Babylon uses Sargon's military model to conquer Mesopotamia.
1307 BCE - 612 BCE: The Assyrian Empire conquers and then rules Mesopotamia.
550 BCE - 330 BCE: The Achaemenid Empire conquers and rules Mesopotamia.