Murad IV was one of the mighty Sultans in the history of the Ottoman Empire who was best known for his imperious and authoritative rule including use of brutal methods to restore law and order of the state. The son of Sultan Ahmed I and Kösem Sultan, he succeeded his uncle, Mustafa I, to the throne at just 11 years of age through palace conspiracy. Although the early reign of Murad IV was administered through the regency of Kösem Sultan and a number of grand viziers, the actual power was exercised by unruly quasi-feudal cavalries known as spahis as also the Janissaries. Such period witnessed corruption of government officials, execution of several high officials, draining of treasury and overall lawlessness and rebelliousness. Effective rule of Murad IV saw him applying ferocity and ruthlessness to suppress the mutineers and gain complete control of his empire. He implemented strict rules including banning wine, coffee and tobacco among others and would execute violators or even suspects. He was the first Ottoman Sultan who executed a highest Muslim dignitary, shaykh al-islām, in the empire. The most notable accomplishment of his reign was recapturing of Baghdad and the Ottoman victory during Ottoman-Safavid War (1623–39).