Due to continuous raids by Persians into the area, Caliph Umar ordered a full invasion of the Sasanian empire in 642, which led to the complete conquest of the Sasanians around 651.
Efter vedvarende persiske plyndringstogter i området beordrede kalif Umar i 642 en fuld invasion af Sassaniderne, hvilket resulterede i den totale erobring af Sassanideriget omkring 651.