Islam in the Ottoman Empire
Islam was the official religion of the Ottoman Empire. The highest position in Islam, "caliphate", was claimed by the sultan, after the defeat of the Mamluks which was established as Ottoman Caliphate. The Sultan was to be a devout Muslim and was given the literal authority of the Caliph. Additionally, Sunni clerics had tremendous influence over government and their authority was central to the regulation of the economy. Despite all this, the Sultan also had a right to decree, enforcing a code called Kanun (law) in Turkish. Additionally, there was a supreme clerical position called the Sheykhulislam ("Sheykh of Islam" in Arabic). Minorities, particularly Christians and Jews but also some others, were mandated to pay the jizya, the poll tax as mandated by traditional Islam.
Ottoman–Persian wars
The Ottoman-Persian Wars or Ottoman-Iranian Wars were a series a wars between Ottoman Empire and the Safavid, Afsharid, Zand, and Qajar dynasties of Iran (Persia) through the 16th–19th centuries. The Ottomans consolidated their control of what is today Turkey in the 15th century, and gradually came into conflict with the emerging neighboring Persian state, led by Ismail I of the Safavid dynasty. The two states were arch rivals, and were also divided by religious grounds, the Ottomans being staunchly Sunni and the Safavids being Shia. A series of military conflicts ensued for centuries during which the two empires competed for control over eastern Anatolia, the Caucasus, and Iraq.