Köse Mountains

Köse Dağ rises northeast of Sivas above the upper Kızılırmak country. Its wooded slopes and high ridges separate valleys leading toward the Black Sea from those of the Anatolian interior. In 1243 a Mongol army defeated the Seljuks in the Battle of Köse Dağ, a turning point that brought the sultanate under Mongol dominance. The mountain's passes remained part of the routes across northern Anatolia.