Complex sentence: To improve mobility Saad divided the rest of his army into four corps under the commanders Abdullah ibn Mutim, Shurahbeel ibn As Samt, Hashim bin Utba and Khalid bin Arfatah.
Split into simpler sentences: To improve mobility Saad divided the rest of his army into four corps. Under the commanders Abdullah ibn Mutim, Shurahbeel ibn As Samt, Hashim bin Utba and Khalid bin Arfatah.