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Ali bin Talib becomes the fourth Caliph.
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Muhammad returns to Mecca and gains control of the city. Mecca becomes the center of the Islamic world.
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Muhammad and his followers move to Medina to escape persecution in Mecca. This migration becomes known as "Hijrah" and marks the beginning of the Islamic calender.
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The religion of Islam begins when Muhammad receives the first revelations of the Quran.
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Muhammad is born in the city of Mecca.
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Muhammad dies and Abu Bakr succeeds Muhammad as leader of the Islam faith. He is the first of the four Rightly Guided Caliphs. This also marks the beginning of the Rashidun Caliphate.
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Umar becomes the second Caliph. The Islamic Empire expands during his rule to include much of the Middle East including Iraq, Egypt, Syria, and part of North Africa.
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Uthman becomes the third Caliph. He will create the standardized version of the Quran.