Complex sentence: Below the camp, he placed his heavy infantry (Iberians, Celts and Africans) upon a slight elevation.they had ample ground from which they could charge down upon the head of the Roman column on the left flank, when it should reach the position.
Split into simpler sentences: Below the camp, he placed his heavy infantry (Iberians, Celts and Africans) upon a slight elevation. Here, they had ample ground from which they could charge down upon the head of the Roman column on the left flank, when it should reach the position.