They were stopped by Christian countries, who didn't allowed them to spread.
Explanation:
- The most decisive battle was the battle of Poitiers
- The Battle of Poitiers took place between the forces of Franks, led by Charles Martel and the Muslim army of the Umayyad Caliphate, led by Emir Abdullah Rahman.
- Historians view this battle as the turning point of Christianity and Islam in Europe, and the Frankish victory played a major role in making Christianity the primary religion in this region.
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