This article examines the formation of Admapu – an organisation representing a broad sector of Mapuche society that resisted the actions of the Chilean dictatorship during the 1980s. In political memory, the period of agrarian reform marks a time of hope and strong participation, but here we show how an autonomy project developed within Admapu conflicted with those making political alliances with the Chilean Left. We examine the internal dynamics within Admapu, and argue that at the end of the decade the organisation divided into factions that cemented a rupture with the political system and brought about the formation of contemporary resistance movements.