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Achaemenid dynasty rules the first Persian Empire. The ancient city Persepolis was the capital of the Persian Achaemenid Empire. Under the ruler Darius, it stretches from the Aegean Sea and Libya to the Indus Valley at its greatest extent.

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An Arab invasion brings the end of the Sassanid dynasty and the start of Islamic rule.

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Emergence of modern Persian language, (Farsi) written using a form of Arabic script.

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The Mongol forces of Genghis Khan overrun Persia, which becomes part of the Ilkhanate, ruled by descendants of Genghis' grandson Hulagu.

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With the support of Shia Qizilbash warrior tribes, Shah Ismail I becomes first ruler of Islamic Safavid dynasty; Shia Islam declared state religion.

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Apogee of the Safavid Empire under Shah Abbas I, who reforms the army, sidelines the Qizilbash and establishes first diplomatic links with western Europe.

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Mohammad Khan Qajar founds the Qajar dynasty, restoring stability to Iran after half a century.

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Iran cedes control of Caucasus to Russia after second Russo-Persian war.

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Introduction of constitution which limits the absolutist powers of rulers.

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Military commander Reza Khan seizes power.

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Reza Khan crowned Reza Shah Pahlavi.

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https://www.bbc.com/news/world-middle-east-14542438

this is the site to finish time line

this is another to flesh out  geo - politics  https://libwww.freelibrary.org/programs/onebook/obop10/docs/Persepolis_timeline.pdf