 He was brought to power by a palace conspiracy in 1623, and he succeeded his uncle Mustafa I (r. 1617–18, 1622–23).He was only 11 when he ascended the throne.His reign is most notable for the Ottoman–Safavid War (1623–39), of which the outcome would permanently part the Caucasus between the two Imperial powers for around two centuries, while it also roughly laid the foundation for the current Turkey–Iran–Iraq borders.