Why did the Arabs easily subjugate North Africa, with difficulty – Iberia, but could not defeat the Franks?

North Africa was a Byzantine domain. Its inhabitants – Berbers – joined the Arabs and helped them seize the more fertile lands of Iberia (Andalusia) from the Visigoths. In France, the church helped Karl Martell organize a crusade of all Christians against the Muslim interventionists.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.