This is a Filipino martial arts that is well-known around the world. Oftenly mistaken as different arts, kali, eskrima, and arnis are the same and just being called differently depending on the location: Luzon, Visayas, Mindanao, and Abroad. This martial arts used to be a secret art and exlusive to Filipinos only.
This martial arts is specialized in weapons using sticks and knives. In contrary to most martial arts, the student is first trained to use weapons, and after mastering all weapons and weapons tactics, that's the only time hand to hand combat will be taught. The idea behind it is because, according to the masters, weapons are just extensions of arms and hands, so after learning the use of weapons, muscle memory is already present and the same techniques apply in hand to hand combat.
The unarmed combat of this martial art is as dangerous as with the use of weapons. The fighting style is a close body combat with combinations of locking, grabbing, striking, and aikido-like moves. Only a few martial arts use this unusual technique of going towards the enemy to get a foot-closer to counter and strike. One popular martial arts that uses the same concept is Wing Chun, the other one is a powerful Japanese martial arts that is secretly taught to a few chosen ones, I can't mention the art because my friend might kill me (I've seen them in actual fights and you guys won't believe me if I say they can fight up to 4 bigger people at once and knock them out in just 4 seconds or less...see, you don't believe me so no further discussions).
Westerners adopted this great martial arts, and a lot of countries trained their soldiers using this, examples would be Russia's special armed forces and the Navy Seals of America. A lot of actors in hollywood have trained under this art as well. To name some movies that Kali/Arnis/Eskrima was used; Bourne Series starred by Matt Damon, and Sherlock Holmes with Robert Downy Jr.
Another Pinoy pride!!