Street fighting in the context of "Street gangs"

Martial arts are codified systems and traditions of combat. They are practiced for a number of reasons ranging from; violent street fighting, self-defense, military and law enforcement; to non-violent exercising, ceremonial, competition; physical, mental, and spiritual development; entertainment; and to preserve the intangible cultural heritage of a nation. The term "martial arts" was originally used to refer to the traditions of East Asia, but has subsequently been applied to other practices which originated outside that region.

An improvised weapon is an object that was not designed to be used as a weapon but can be put to that use. They are generally used for self-defence or if the person is otherwise unarmed. In some cases, improvised weapons are commonly used by attackers in street fights, muggings, murders, gang warfare, during riots, or even during insurgencies, usually when conventional weapons such as firearms are unavailable or inappropriate.

Improvised weapons are common everyday objects that can be used in a variety of defensive applications. The objects are generally used in their normal state; they are not physically altered in any way to make them more functional as weapons.

Mixed martial arts (MMA) is a full-contact fighting sport based on striking and grappling, incorporating techniques from various combat sports from around the world.

In the early 20th century, various inter-stylistic contests took place throughout Japan and the countries of East Asia. At the same time, in Brazil there was a phenomenon called vale tudo, which became known for unrestricted fights between various styles such as judo, Brazilian jiu-jitsu, catch wrestling, luta livre, Muay Thai and capoeira. An early high-profile mixed bout was Kimura vs Gracie in 1951. In mid-20th-century Hong Kong, rooftop street fighting contests between different martial arts styles gave rise to Bruce Lee's hybrid martial arts style, Jeet Kune Do. Another precursor to modern MMA was the 1976 Ali vs. Inoki exhibition bout, fought between boxer Muhammad Ali and wrestler Antonio Inoki in Japan, where it later inspired the foundation of Shooto in 1985, Pancrase in 1993, and the Pride Fighting Championships in 1997.