Argentina’s 1980s transition to democracy is globally admired for pioneering a state-led process addressing the 1976–1983 dictatorship’s state-violence. The role of international law in the transition is well documented, especially through human rights and crimes against humanity. Yet, the extent to which Argentina’s transition was intertwined with international law and subject to its jurisdictional force deserves greater attention. This article analyses how the Argentinian truth commission (TC) accounts for the dictatorship’s state-violence, and how international law is implicated in the making of this account. It argues that the TC’s account draws on the authority of international law to establish the unlawfulness of the dictatorship’s state-violence. In turn, the TC subjects the meaning and interpretation of the dictatorship’s state-violence to a Eurocentric/Anglo-American lawfulness embedded in, and mobilized by, international law in the late-Cold War. To examine this, the article re-reads the Prologue to the TC’s Report as a literary text that does international legal work, harnessing the authority of international law in a way that has enabled the TC to deploy an authoritative, internationally acceptable, account of the unlawfulness of the dictatorship’s state-violence. This reading is based on original archival research, on scholarship in the fields of ‘law and literature’ and the history and theory of international law.