Even in the provinces presumed to be the most uniform, highly complex structures exist.- The old sedentary agricultural population that we call "Yerliler" (locals), sometimes also called Manavs.- Yörüks, the pastoral nomadic population of the 'Old Ottoman' territory. They were forcibly settled after the Tanzimat.- Turkmens, nomads arriving from the Maraş-Urfa-Aleppo region starting from the late 15th century.- Karabakhis, Sunni Azerbaijanis who sought refuge in the Ottoman Empire during the wars of Shah Abbas in the 17th century.- Caucasians, Circassians and Abkhazians who migrated after 1864 and 1878.- Tatars and Nogais migrated from the region between Crimea and the Danube roughly during the same period as the Circassians.- The term Muhacir, on the other hand, refers to those arriving from the Balkans after 1878 or in the 20th century.