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It lasted for so long because the Assyrians were absolutely ruthless in subjecting and controlling the peoples living in their Empire. That Empire fell apart when after the death of King Ashurbanipal in 627 BC, three rivals for the throne went at each other's throats in a series of civil wars. This gave many subject peoples the opportunity to detach themselves from the Empire. The Persian and Babylonian Empires then formed a coalition to make themselves masters of what remained of the Assyrian Empire.

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7y ago

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