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In page Chukchi people:

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The warlike Chukchi waged frequent wars against neighboring tribes, especially the Koryaks.[1] Russians first began contacting the Chukchi when they reached the Kolyma River (1643) and the Anadyr River (1649).[2] The route from Nizhnekolymsk to the fort at Anadyrsk along the southwest of the main Chukchi area became a major trade route. The overland journey from Yakutsk to Anadyrsk took about six months.[citation needed]