Abstract The narrative of indigenous extinction and the construction of a “white” Argentina entailed an ethnogeographic imaginary by which the territories of the former Spanish colonies were inhabited since the nineteenth century by gauchos or eventually peasants. The population classified as indigenous, in this view, was projected outside the central areas controlled by the nation-state, beyond the frontiers of the Pampas, Patagonia, and the Chaco. Historical writing accepted and contributed to the formation of this image by characterizing the political mobilization of gauchos or peasants (especially in their bellicosity as montoneras — irregular militia units) as a natural reflection of the projects of elites, factions, patrons, or parties. That historiography dismissed as irrelevant any demands stemming from the gauchos and peasantry themselves, such as those based on the long historical experience of indigenous peoples. Based on documents preserved by inhabitants of the travesía, or the desert, of Guanacache, in the central Cuyo region, the descendants of the Huarpe Indians who were considered extinct in the seventeenth century, this analysis stresses the continuity of indigenous claims and the political strategies of the communities of the countryside during the nineteenth century. While recognizing that other factors were involved in political mobilization, this analysis shows the primary importance of indigenous claims in an area of traditional montonero rebellion and civil conflict, and the active participation of the region in the construction of the state beginning in the 1820s. Indigenous leaders who also served as government officials pressed for institutionalized recognition of indigenous rights. That pressure eventually led to the acceptance of their claims and the maintenance of relative political autonomy until the 1870s.