In the Islamic Defense decision-making system, how to add between " rational measure "(based on material means) and" relying on divine promises " (based on occult means), especially in the conditions of power imbalance that material calculations dictate to avoid conflict, is a strategic challenge. The study introduces the framework of the "faith-based computational system" with the aim of explaining the optimal decision-making model in these conditions, using a descriptive-analytical method and citing the verses of the Qur'an and the prophetic sermon. The findings of the study, which is the result of the comparative analysis of the four key events of the Islamic Revolution (the Battle of Badr, Ahad, the trench and the peace of Hadeeth), show that the effectiveness of divine promises is not an automated process; it is conditional on "a pivotal duty" and adherence to the three pillars of "belief in Destiny", "confidence in divine sufficiency" and "hope for my help in the least". The analysis of these invasions proves that when material calculations overshadow the logic of performing the task (such as the one), divine help is taken away, and when in the absolute material impasse, trust in the promise of God is based (such as the trench and the hadith), the balance of power has changed in favor of the right front. Emphasizing flexibility in tactics (war or peace) and stability in strategy (trust), this model provides an efficient model for managing contemporary defense crises.