The Pekiti-Tirsia Kali system is an authentic, indigenous combat Bladefighting system from the Philippines that employs all traditional weapons including Empty-Hands. The foundation system of Pekiti-Tirsia is the Doce Methodos. The Doce Methodos are the twelve (12) methods that define every manner and method in which a bladed weapon can be used to strike with. Doce Methodos defines strikes and attacks by angle, energy, weapon anatomy (strikes with the edge, point, back of blade and butt) and manipulation. Knowledge of the tactics and techniques of the Doce Methodos transfer to all weapon categories and allows one to effectively employ any weapon (edged, impact, flexible, projectile) and combination of weapons (double, long and short) in combat. The advanced systems of Contradas, Contra-Tirsia Doble-Dos, and Advanced Combat Methods all likewise transfer in application to all weapons. This strategic structure and systemology provides the most effective and expedient training process for transferring the knowledge, understanding, and skills of close quarters combat. This systemology is unique to the Filipino martial arts and exclusive to the Pekiti-Tirsia system today.