What was one effect of islamic expansionist policy in the 7th century?

Conquest of areas in Near and Middle East and Northern Africa.

Explanation:

After the death of Mohammed his successor started spreading Islam and thus spreading their countries. In 7th Century Umayyad Caliphate was established and the territory of this country was including Syria, Palestine, Egypt and Northern Africa.

The spreading didn't stop there, but it continued in later periods, with the conquer of Spain.

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