Fleet, Kate (2009). The Cambridge History of Turkey: Byzantium to Turkey, 1071–1453: Volume 1(PDF). Cambridge University Press. p. 1."The defeat in August 1071 of the Byzantine emperor Romanos Diogenes
by the Turkomans at the battle of Malazgirt (Manzikert) is taken as a turning point in the history of Anatolia and the Byzantine Empire.