In 1071 the Seljuk Turks, who practiced this religion, defeated the Byzantine Army at the Battle of Manzikert
[DOC] [TLE] ByzantineSeljuq wars - Wikipedia [PAR] The ByzantineSeljuq Wars were a series of decisive battles that shifted the 
balance of power in Asia Minor and Syria from the Byzantine Empire to the Seljuq 
Turks.