In the 19th century major population movements altered the original Patagonian demography. Between 1820 and 1850 the original Aonikenk people were conquered and expelled from their territories by invading Mapuche (that called them Tehuelches) armies. By 1870 most of northern Patagonia and the south east Pampas were Araucanized.Neuquén: Los pueblos originarios y los posteriores part I , part II
