Before the 17th century Kamchatka was inhabited solely by Koryaks, Itelmen, Ainu, Aleuts and Chukchi. The indigenous Even arrived a hundred and fifty years ago, migrating away from Russian expansion in Yakutia or from other indigenous groups who moved into Even territory after being pushed out of their own. The Itelmen and Ainu have now been assimilated into mainstream Russian society, although many still claim indigenous origins as it grants certain hunting and fishing privileges. The Aleuts were re-settled by the Soviet government to the remote Commander Islands where they live in one village to this day. The Even, though still herding reindeer and horses, have mostly forgotten their own language and are fairly "Russified". The reindeer-herding Koryaks have their own autonomous region which takes up the whole northern half of the Kamchatka Peninsula and the Chukchi live in the far north of that region. A few of the Koryaks from Olyutorsky and Penzhinsky Districts in the far north of Kamchatka have preserved their shamanistic religion and some of their traditional chants.