This study explores the evolution of Czechoslovak Military Intelligence cooperation within the framework of the Warsaw Pact, utilizing Jennifer E. Sims’ intelligence liaison model as a theoretical lens. The analysis reveals that early cooperation was bilateral, progressing toward a structured multilateral framework by the 1960s. A significant milestone occurred in 1964 with the institutionalization of annual conferences for military intelligence chiefs, facilitating exchanges of intelligence across multiple domains. Collaboration included sharing intelligence data, operational experiences, education, and joint exercises. While relations with East Germany, Poland, and Hungary were largely symmetrical, cooperation with Bulgaria was notably asymmetric. The hierarchical relationship with Soviet military intelligence, characterized by imbalanced information flows, underscores the influence of geopolitical dynamics. By the 1980s, intelligence cooperation was increasingly standardized and supported by automated processes. This research highlights the transition from bilateral to multilateral cooperation, demonstrating how political and strategic factors shaped intelligence interactions within the Warsaw Pact.