These people ruled during the life of Yunus Emre, a key poet for their language. According to Edward Gibbon, one of their leaders died trying to fire an arrow as his foot slipped, letting a Khwarezmian stab him. Their rulers used a book on governance whose writer, eventually assassinated by the original Assassins, was the vizier Nizam al-Mulk. These victors at Dandanaqan refounded the city of Konya, where they let the new Mevlevi order of (*) whirling dervishes grow. Decades after Tugrul led them, these Sunni Muslims defeated Romanus IV Diogenes' Byzantines under the command of Alp Arslan at Manzikert. For 10 points, 
These people ruled during the life of Yunus Emre, a key poet for their language. According to Edward Gibbon, one of their leaders died trying to fire an arrow as his foot slipped, letting a Khwarezmian stab him. Their rulers used a book on governance whose writer, eventually assassinated by the original Assassins, was the vizier Nizam al-Mulk. These victors at Dandanaqan refounded the city of Konya, where they let the new Mevlevi order of (*) whirling dervishes grow. Decades after Tugrul led them, these Sunni Muslims defeated Romanus IV Diogenes' Byzantines under the command of Alp Arslan at Manzikert. For 10 points, name these semi-nomadic people who settled the Middle East and Anatolia in the 11th century, before the Ottomans supplanted them.
These people ruled during the life of Yunus Emre, a key poet for their language.
Seljuk Turks [or Seljuk Sultanate, empire, etc.; prompt on \"Turks\"; prompt on \"Sultantate of Rum\"]