When did the Mongols gain power over the Anatolian Seljuqs?

The Mongols gained power over the Anatolian Seljuqs following the Battle of Köse Dağ in 1243. During this conflict, the Seljuq sultan Ghiyās al-Dīn Kay-Khusraw II was defeated by the Mongol commander Bayjū, which resulted in the Anatolian Seljuqs becoming vassals to the Mongols.12

Following this defeat, Seljuq autonomy was effectively lost. Mongol influence deepened further after a second defeat of the Seljuqs near Aksaray in 1256, after which Mongol troops were permanently stationed throughout Anatolia until 1335. While the fiction of Seljuq rule was maintained for several decades, the sultans became essentially figureheads under Mongol oversight, and the Mongols eventually established more direct control over the region.13