You can take as reference the Fidai in the Nizari sect :
The followers of the young Imam Hadi who joined the military were trained as the Fidai. The Fidai's bravery and self-sacrificing spirituality was due to their belief that the Nizari Imam-ul-waqt ("Imam of the time") had the Noor (light) of God within him. As such it became a religious duty for the Fidai to obey every dictate of their Imam-ul-waqt and to protect him and their community of believers without compromise even to the extent of dying for their cause.
The Fidai were feared as the Assassins, but in fact did not assassinate for payment. Although they were trained in the art of spying and combat, they also practiced their Islamic mysticism at the highest level. This religious ardor turned them into formidable foes which reached an incredible level as told in the anecdote of Count Henry of Champagne. Returning from Armenia, Henry spoke with Grand Master Rashid ad-Din Sinan (known to the West as "The Old Man of the Mountain") at one of his castles, al-Kahf, in Syria. Henry pointed out that since his army was bigger by far than Sinan's, Sinan should pay him an annual tribute.
Sinan refused asserting that his army was far stronger in spirit and unquestioning obedience if not in numbers. He invited Henry to witness this obedience and sacrificial spirit of his Fidai. Sinan signalled to a Fidai standing on the parapet of a high wall of his castle, to jump. The Fidai called out "God is Great" and unhesitatingly took a headlong death dive into the rocks far below.
The bewildered Henry asked Sinan the cause for the suicidal jump. Sinan pointed once again to the Fidai who had taken the place of the now dead Fidai. Again Sinan gave a signal to the Fidai to jump and the second Fidai also called out "God is Great" and jumped to his death. Henry was visibly shaken by the experience of witnessing the two Fidais' total disregard for their own lives. He accepted Sinan's terms of peace on a non-tribute paying basis. The Nizaris thus averted debilitating wars against them because of their Fidais' feats of self-sacrifice and assassinations of powerful enemy leaders to demonstrate the will and commitment of the community to live free from being a vassal to any Levantine power.
By the way, agencies like KGB and STASI in the past used trained women to carry on espionage, by using them as sexual weapons. They used their allure to gain the confidence of the targets, and once in their bed keeping all the informations that were needed. They were trained to even moan in the local language to keep cover. So you can easily replace the motivation from "faith in god" to "faith in a political apparatus".