The present study aimed to explain a model of death anxiety based on attachment styles to God, with psychological hardiness serving as a mediator, among university students in Tehran who experienced the conditions of the "Ramadan War." This descriptive-correlational study employed a structural model using the Partial Least Squares Structural Equation Modeling (PLS-SEM) approach. The statistical population consisted of students from the Science and Research Branch of the Islamic Azad University who were exposed to the psychological consequences of the Ramadan War in Tehran between February 28, 2026 (Esfand 9, 1404) and April 10, 2026 (Farvardin 21, 1405). A sample of 203 undergraduate and graduate psychology students was selected via convenience sampling. Data were collected using the Templer Death Anxiety Scale, the Patrick Attachment to God Questionnaire, and the Kiamarsi Psychological Hardiness Questionnaire, and were subsequently analyzed using SPSS-27 and SmartPLS-3 software. The findings indicated that secure attachment to God has a significant positive effect on psychological hardiness, while anxious attachment has a significant negative effect; avoidant attachment, however, showed no significant effect. Furthermore, psychological hardiness exhibited a significant negative relationship with death anxiety and acted as a full mediator in the relationship between secure/anxious attachment and death anxiety. Conversely, the direct effects of attachment styles on death anxiety were not statistically significant. These results suggest that strengthening psychological hardiness can serve as an effective mechanism for channeling the protective benefits of secure attachment to God toward the reduction of death anxiety during crisis situations.