This research paper provides a comprehensive analysis of the strategies and deterrent measures employed by the Islamic Revolutionary Guard Corps (IRGC) of Iran to preserve public order and security. The study is situated within the evolving paradigm of security studies, which has expanded from traditional state-centric military defense to encompass broader concepts of "human security" and hybrid warfare. The article posits that the IRGC has developed a unique, multi-layered model of deterrence to address Iran's complex security challenges. The Islamic Republic of Iran, due to its pivotal geopolitical and geostrategic position in West Asia, faces a multifaceted array of threats, ranging from conventional military risks and cross-border terrorist groups to more nuanced challenges such as cultural infiltration, cognitive warfare, media propaganda, cyber-attacks, and economic sanctions. Theoretical Framework and Methodology The study employs a mixed-methods research approach, combining qualitative and quantitative techniques. The qualitative phase utilized a two-round Delphi method, involving semi-structured interviews and theoretical content analysis with 14 security and defense experts from relevant state institutions. This phase identified key dimensions, components, and themes related to the IRGC's management of terrorist crimes. The quantitative phase involved a closed questionnaire, derived from the Delphi findings, which was distributed to security experts and mid-level IRGC managers. Respondents rated the importance of various factors using a four-point Likert scale. Data analysis was performed using Friedman's test and Kendall's coefficient of concordance to rank the factors and measure the level of expert consensus.