jan 1, 641 - Conquest of Egypt

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The Muslim invasion of Egypt was led by the commander Amr ibn Al-Aas, who commanded a force larger than any army that the Byzantines could field at the time, as a result of their crushing defeat at Yarmuk four years earlier.

The original attempts by the Arab forces were not directed solely towards Alexandria, but rather at removing the Byzantine fortress of Babylon (Siege of Babylon Fortress) on the Nile Delta.[6] The destruction of the Byzantine military power at the ensuing battle of Heliopolis, also known as Ain Shams, in the summer of 640 and the victory over the Byzantine defenders at Babylon effectively broke Byzantine power in Egypt.

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