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Period: 3000 BCE to 2600 BCE
The rise of the great Indian cities of Mohenjo Daro and Harappa.
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2500 BCE
Well planned cities flourished in the valley
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2500 BCE
Earliest use of the Indus Script
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2000 BCE
Indus valley farmers began to abandon their land
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Period: 2000 BCE to 1500 BCE
Newcomers from the north entered the valley
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1500 BCE
Aryans began to migrate into the Indus Valley.
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800 BCE
People of northern India had learned to make tools and weapons out of iron
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500 BCE
There was a strict division of classes
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320
The Gupta dynasty rose to power