This article examines the activism of a specific subset of Chilean communist women - those whose loved ones were abducted and who mobilised to demand justice - against the Pinochet dictatorship. It focuses on a well-organised and well-publicised hunger strike inside the United Nations headquarters in Santiago, Chile, which denounced the dictatorship's use of forced disappearance. It argues that these women's prior political experience and contacts enabled them to organise demonstrations and make successful human rights claims in a changing global environment. In so doing, this article expands and re-politicises the cast of protagonists of the human rights revolution of the 1970s.