This article explores the long duration of posttransitional authoritarian discourses of “national security” in Uruguay, in the five decades since the coup that led to a State terrorist regime. We posit that the current deployment of Cold war era discourses justifying state terrorism constitute foundational master tools that enable modern-day military and alt-right autocrats to conceal human rights violations and appropriate the liberal human rights discourse for illiberal political ends. Authoritarians of this new type use these resignified democratic discourses to perpetuate their power, gain influence, and legitimize their repressive illiberal practices. The article uses three public debates relating to the military’s illicit actions in the dictatorship and their involvement in contemporary politics via the new military political party, Cabildo Abierto, to show how these authoritarian tools are deployed in political discourse. We analyze a corpus of texts from recent judicial documents with military “confessions,” official withholding of secret archives, and law proposals presented in Congress. Our findings show that dictatorship-era discourses of “national security” are employed by contemporary military and right-wing political actors for the purpose of sustaining their power. We reveal continuities in dictatorship era discourse practices and strategies that contribute to the emergence of new autocratic social actors who enter the political sphere to capture state resources and protect their group interests. Our findings contribute to the exploration of discursive uses of the past in the present resulting in increased political polarization and autocratic tendencies in contemporary Uruguay.