Complex sentence: The Abbasid army under supreme commander Ibn Ra'iq, in an attempt to subdue the Ikhshidids of Egypt, fought against them in an indecisive battle at Lajjun, in which the general of the Ikhshidids and brother of their king, Abu Nasr Husayn, was killed.
Split into simpler sentences: The Abbasid army under supreme commander Ibn Ra'iq, in an attempt to subdue the Ikhshidids of Egypt, fought against them in an indecisive battle at Lajjun. During the battle, Abu Nasr Husayn--the general of the Ikhshidids and brother of their king--was killed.