Arnis, also known as kali or eskrima/escrima, is the national martial art of the Philippines. These three terms are, sometimes, interchangeable in referring to traditional martial arts of the Philippines, which emphasize weapon-based fighting with sticks, knives, bladed weapons, and various improvised weapons, as well as "open hand" techniques without weapons.

Martial arts are codified systems and traditions of combat practiced for a number of reasons such as self-defence; military and law enforcement applications; competition; physical, mental, and spiritual development; entertainment; and the preservation of a nation's intangible cultural heritage.