Linked from
The 9 pages that link to Arab conquest of Egypt, each with the reason it gives.
Roman EgyptRelated: The conquest ended Byzantine control and the Roman provincial era in Egypt.
FustatRelated: The conquest created the political conditions for founding Fustat in 641.
MakuriaRelated: It created the new northern power with which Makuria negotiated.
CoptsRelated: It began a new political setting for Egypt’s Christian communities.
Culture of EgyptRelated: It began long-term changes in language, administration, and religious life.