Prior to 1800 they inhabited lands further east, near the Athabasca and Clearwater Rivers, and north to Lake Athabaska. In the 18th century, this area was opened to fur trading. The Chippewa, a powerful people to the east of the Dunneza, had become highly dependent on the European goods and the maintenance of a trade monopoly with the traders. To maintain their proximity and influence, the Chippewa moved with the traders westward into the Athabasca, forcing the Dunneza north and west from their lands to those near the Peace River. By 1800, the Dunneza had relocated to this new territory. In 1899, many Dunneza communities signed Treaty 8 with the government of Canada.
Cook, Eung-Do; & Rice, Keren (Eds.). (1989). Athapaskan linguistics: Current perspectives on a language family. Trends in linguistics, State of-the-art reports (No. 15). Berlin: Mouton de Gruyter. ISBN 0-89925-282-6.
Story, Gillian. (1989). Problems of phonemic representation in Beaver. In E.-D. Cook & K. Rice (Eds.), Athapaskan linguistics: Current perspectives on a language family (pp. 63-98). Berlin: Mouton de Gruyter.