The Battle of Köse Dağ was fought between the Sultanate of Rum ruled by the Seljuq dynasty and the Mongol Empire on June 26, 1243, at the defile of Kösedağ, a location between Erzincan and Gümüşhane in modern northeastern Turkey.[10][11] The Mongols achieved a decisive victory.
Battle between Seljuk Sultanate of Rum and Mongols that results in Mongol victory