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  In about 610 Muhammad began receiving the Quranic revelations
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  Muhammad put together the Constitution of Medina in 622.
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  632 marked the death of Muhammad and the start of Islamic conflict
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  In 633 Abu Bakr had military campaigns against ex-Muslims
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  In 634 Abu Bakr declared war on Byzantine Empire.
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  Caliph Umar ordered full invasion of Sassanid Empire in 642
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  Uthman was a Caliph from 644 to 656.
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  In 656 Ali becomes the ruler of the Islamic state.
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  Ali was assassinated in 661 after a civil war began during his reign.
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  In 750, rebels overthrew the Umayyad Dynasty. Then a new dynasty emerged called the Abbasid Dynasty.