ルーム・セルジューク朝
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 Köse Dağ, a location between Erzincan and Gümüşhane in modern northeastern Turkey. The Mongols achieved a decisive victory.