Wikipedia
Juramentado, in Philippine history, refers to a male Moro swordsman who attacked and killed targeted occupying and invading Christian police and soldiers, expecting to be killed himself, the martyrdom undertaken as an unorthodox form of personal offensive jihad, considered a form of suicide attack. Unlike an amok, who commits acts of random violence against Muslims and non-Muslims alike, a juramentado was a dedicated, premeditated, and sometimes highly skilled killer who prepared himself through a ritual of binding, shaving, and prayer in order to accomplish brazen public religious murder armed only with edged weapons.
For generations warlike Moro tribes had successfully prevented Spain from fully controlling the areas around Mindanao and the Sulu Archipelago, developing a well-earned reputation as notorious seafaring raiders, adept naval tacticians, and ferocious warriors who frequently demonstrated extraordinary personal bravery in combat. While Moro forces could never match opponents' firepower or armor, such bands used intelligence, audacity and mobility to raid strongly defended targets and quickly defeat more vulnerable ones. One extreme asymmetric warfare tactic was the Moro juramentado.