This chapter combines critical heritage studies and feminist international relations in an analysis of temporality in Sweden’s Cold War military heritagisation. Sweden’s Cold War history is characterised by war-preparedness and a lack of significant military action, allowing for different framings of time in heritage presentations. Accounting for Sweden’s nonaligned yet heavily militarised stance during this period, we demonstrate how different temporal frames shape collective identity and ideas of security. Four temporal constructs are identified, of which two are discussed at length: parenthesis-time, suspending the timeline and reinforcing the idea of a perpetual threat, and phantasm-time, blurring the distinction between actual events and hypothetical scenarios, resulting in hyperdramatic narratives. These temporalities contribute to the promotion of military violence as a means of ensuring security while discouraging democratic discussions. Our analysis underscores the political significance of military heritagisation in shaping national identity and security perceptions.