Complex sentence: Islam gained its first foothold in continental Europe in 711 with the Umayyad conquest of Hispania, but the Umayyads were gradually driven south and in 1492 the Moorish Emirate of Granada surrendered to Ferdinand V and Isabella.
Split into simpler sentences: Islam gained its first foothold in continental Europe in 711 with the Umayyad conquest of Hispania. Over the centuries the Umayyads were gradually driven south and in 1492 the Moorish Emirate of Granada surrendered to Ferdinand V and Isabella.