The Kurds have their own militia that fights well in Iraq and Northern Syria. Effectively they have their own country in Northern Iraq. The Kurds maintain their ethnic identity despite having been divided up between Iraq, Syria, Turkey and Iran nearly a century ago. We saw the strength of that identity when Kurds from Iraq passed through Turkey to join the defense of a Kurdish city in Syria. Turkey was a bit nervous about this because it has a Kurdish minority making up 25 percent of its population, with said minority being in a state of rebellion much of the time.