The history of Kurds is often compared with the history of the Polish nation under rules of Germany, Russia and Austria in 19th century.
The predecessors of the Kurds are Medes. To be more precise, the Kurds are kind of mixture between the Khurrites (Hurrians) who lived in Northern-Mesopotamia almost 5000 years ago and the Medes who conquered them.
In VII BC they have founded an Empire of Medes. In 612 BC they have conquered the powerful Assyria and spread their domination through the whole Iran as well as central Anatolia.