Kızılırmak River
At the origins of written history, the Anatolian plains inside the area ringed by the Kızılırmak River were occupied by the first defined civilization in Anatolia, a non-Indo-European indigenous people named the Hattians (c. 2500 BC – c. 2000 BC). During the middle Bronze Age, the Hattian civilization, including its capital of Hattush, continued to expand.