 Complete the following phrase:   Al-Walid I began the next stage of Islamic conquests. Under him the early Islamic empire reached its farthest extent. He reconquered parts of Egypt from the Byzantine Empire and moved on into Carthage and across to the west of North Africa. Muslim armies under Tariq ibn Ziyad crossed the Strait of Gibraltar and began to conquer the Iberian Peninsula using North African Berber armies. The Visigoths of the Iberian Peninsula were defeated when the Umayyad conquered Lisbon. The Iberian Peninsula was the farthest extent of Islamic control of Europe they were stopped at the 