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The Sumer form the first towns and cities. They use irrigation to farm large areas of land
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Sumer establish powerful city-states building large ziggurats at the center of their cities as temples to their gods.
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Lower Mesopotamia is inhabited by numerous Sumer city-states such as Ur, Uruk, etc.
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Sumerians invent the first system of writing.
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Sumerians start using wheels on vehicles
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Sumerians implement math using a number system with the base 60
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King Gilgamesh rules the city-state of Ur.
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The Elamites capture Ur.
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Assyrians rise to power once again.
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The Assyrians capture Babylon