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In page Gaza City:

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In c. 638 Gaza was captured by Arab Muslim forces under Amr ibn al-As, in the years following the Battle of Ajnadayn between the Byzantine Empire and the Rashidun Caliphate in central Palestine.[1] It was captured by Amr's forces about three years later. Believed to be the site where Muhammad's great-grandfather Hashim ibn Abd Manaf was buried,[citation needed] Gaza was not destroyed and its inhabitants were not attacked by Amr's army despite the city's stiff and lengthy resistance, though its Byzantine garrison was massacred.[2]