What martial arts are there in the world?

Brazil: Gracie Jiu Jitsu, Brazilian War Dance

Russia: Sambo, Battle of Sistema.

Thailand: Muay Thai, ancient Muay Thai.

Japan: Karate, Jiu Jitsu, Judo, Aikido, Sumo, Taekwondo and Sabre.

Korea: Taekwondo (formerly known as Hualangdao)

Philippines: short stick (wand)

French: Sabat

Mongolia: Wrestling

Ancient Greece: Pankration

Indo: Paya, Calari.

Germany: Gaul fencing (fencing)

Malaysia, Nigeria and Malaysia: Benza

Britain: The Battle of Setari.

American is too miscellaneous, practical first, as long as it is useful: boxing, wrestling, street fighting, jujitsu. . . .

Actual combat is the best.