Riding from the steppes of Central Asia , the Seljuq replicated tactics practiced Practice by the Huns hundreds of years earlier against a similar Roman opponent but now combining Cause_to_amalgamate it with new-found Islamic zeal ; in many ways Action , the Seljuq resumed Process_start the conquests Conquering of the Muslims in the Byzantine–Arab Wars initiated Process_start by the Rashidun , Umayyad and Abassid Caliphate in the Levant , North Africa and Asia Minor .