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Muhammad wrote the Constitution of Medina. The constitution is very important to the religion.
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Muhammad dies and this hurts the empire because he was the one who made the religion
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The military makes the empire strong
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Abu Bakr dies and this hurts the empire because he was the first caliph
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Ali becomes the new Caliph but, it doesn't last long because later he gets assassinated
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The rule starts.
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The empire doubles and becomes more powerful.
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The dynasty is brought down and the Abbasid Empire is created.
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The reign ends in Spain for the Islamic empire.
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The expansion ends