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The Rig-Veda are composed. The Rig Veda is a group of poems that people in India first sang and recited for hundreds of years.
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The Indo-Aryans use iron tools. Once the Aryans learned how to use iron, they used their new weapons to conquer more of India, and moved to the south and east into the Ganges river valley.
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The Indus river valley saw an invasion of Indo-Europeans who came from the area between the Black Sea and the Caspian sea.
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The Aryans first settled along the Indus River, in the same place where the Harappa people had lived. They settled down and mixed with the local Indian people.
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Excavations at these sites and later archaeological digs at about seventy other locations in India and Pakistan provide a composite picture of what is now generally known as Harappan culture
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Indo-Aryans invade India from the west and expel the Dravidians.
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Indo-Iranians separate from the other Indo-European tribes and migrate eastward to settle in Iran.
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At Harappa, the discovery of a different pottery style suggests the arrival of outsiders. Archaeological evidence shows that various peoples did cross into the subcontinent.
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Between 2600-1900 B.C. the Harappan's reached their height of economic expansion and urban growth.
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By around 2000 BC, the Harappan civilization had collapsed. Most people think the most likely reason is that the warming trend continued until there wasn't enough water even in the Indus river valley to support these cities and the farmers who fed them.
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the civilization of the Indus Valley declines. It has been suggested that perhaps the people of the Indus Valley Civilization were destroyed by invading barbaric tribes. It has also been suggested that the Aryans may have attacked and destroyed the Indus Valley Civilization.
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The discovery of Harappan seals in Mesopotamia indicates that Indus Valley people traded with the Mesoptamins.
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By 2500 BC the Harappan's settled in the Indus river valley, where they began to live in cities and use irrigation to water their fields.
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the cities of Harappa and Mohenjo-Daro, 400 miles apart, in the Indus Valley were founded. Archaeologists named the cities Mohenjo-Daro, which means “hill of the dead,” and Harappa, after a nearby city.
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Dravidian speaking people develop the civilization of the Indus Valley.