Answer:
The Arab empire began in the 7th and 8th centuries AD.
Explanation:
The Arab empire began to emerge as people got influence by the teaching of Prophet Muhammad. The Arab Empire starts with conquering vast territories after the death of Muhammad, the founder of the Islamic religion. As Islam spread through military conquest and trade it came under the Arab empire. As they reached in their peak, the Arab empire reached from the Arabian peninsula to Iberian peninsula (Spain).
