[nwrep]

Perfect timing for the onslaught of Islam.

[nicollo]

Perfect timing for the onslaught of Islam.

Actually, for Arab military aggression, as the events led to decline in Byzantine and Sassanid power that Arabs, like Mohammad (if he even existed), among many, filled. Archeological evidence from Arabia dating in the late 6th century shows a distinct turn in site construction towards defensive design.

Islam followed those initial conquests when their leaders needed to distinguish themselves from the Jews and Christians in order to justify their rule.