Complex sentence: Both of these influential leaders belonged to the "Ikhwan" movement, and shortly after joining, Sultan ibn Bjad Bin Humaid became the leader of the movement, who were then deployed by the Ibn Saud clan against rivals.
Split into simpler sentences: Both of these influential leaders belonged to the "Ikhwan" movement. Shortly after, Sultan ibn Bjad Bin Humaid became the leader of the movement, who were then deployed by the Ibn Saud clan against rivals.