Chaka Bey (Turkish: Çaka Bey), was an 11th-century Seljuk military commander of Oghuz Turk origin who ruled a vassal state of the Seljuks based in Smyrna (present-day Izmir). Originally in Byzantine service, he rebelled and seized Smyrna, much of the Aegean coastlands of Asia Minor and the islands lying off shore in 1088–91. At the peak of his...