 One group was driven westward (possibly the ancestors of the Njalgulgule people) and the other group, consisting of Dar Fur Daju, were driven east into the Nuba Hills settling near Lagowa where they developed their own distinct dialect of the Nyala language.Over time, the Tunjur introduced Islam to the region (which had previously been pagan) and gradually adopted Arabic as their administrative language.In 1596, control of Darfur passed into the hands of the hybrid Keira dynasty through intermarriage between the last sultan of the ruling Tunjur dynasty, Ahmad al-Maqur and its more populous vassals the Fur people.