Rashidun & UmayyadPolitical
Iran becomes part of the Caliphate
With the fall of the Sasanians, the Iranian plateau is absorbed into the rapidly expanding Islamic Caliphate.
Conquest was gradual and often resisted, region by region. Zoroastrians became a protected but taxed minority, and conversion to Islam spread over generations. Arab garrison towns and governors ruled, but Persian remained the language of the countryside and the old administrative classes soon made themselves indispensable.

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