The Arabs’ conquest of Egypt from the Byzantines in 639 was made easier by the Egyptian population’s attachment to the monophysite branch of Christianity, regarded as a heresy by the Byzantine authorities in Constantinople, and therefore persecuted. The Arabs granted their conquered populations freedom of worship, and the Egyptians therefore welcomed them as liberators rather than conquerors.
Egyptian society has thus far been little affected by the Arab conquests. For most of the population, it has been a case of swapping one alien ruler (in Constantinople) for another. The Arab presence was initially restricted to their new garrison town of Fustat, from which Egypt is now governed.
ORIGINAL SOURCE: timemaps.com