4D Combat


4D Combat was developed from the two amazing arts of Jeet Kune Do (JKD) and Kali.


JKD, developed by Bruce Lee, is in many ways the original MMA of the modern era, whereas Kali is the ancient warrior art of the Philippines.


Both are amazing arts but how do you master both of these in one lifetime? 


Bob wanted to create a simpler model; something that would work for normal people yet have all the depth of the arts from which it was derived.


Lots of JKD and Kali techniques were similar so the first thing Bob did was to cut out the duplicates and then he prioritised the things that really happened in a street fight or competition. His aim was to keep the art, but prioritise the function.


He made the decision that 4D Combat would concentrate on stand up fighting - where all fights start and most end.



The name 4D Combat came about as the system comprises the four dimensions of stand up combat:


  • Striking

  • Clinching

  • Weapons

  • Group Attack

Bob’s aim with 4D Combat is for people to achieve mastery in their lifetime and on their own terms; the art has to suit you.


  • It has to be simple

  • It has to be truthful

  • It has to be instinctive

  • It has to work - whatever comes up!

  • And it has to be tested - so you believe in it,  and know that it works.


Therefore in 4D Combat, the same game formats or templates are used, whatever you’re doing. This makes you faster, both mentally and structurally.


“Whilst they’re deliberating, you’re obliterating.”

4D Combat map.jpg




How To Train In 4D Combat


4D Combat is hard and fast hitting, and very fast mentally. It's simple yet deep. It's an art you can master, and be truly functional in, yet it's deeply rooted in JKD and Kali.

Guru Bob Breen

What is Jeet Kune Do?


The art of Jeet Kune Do (JKD) was developed by Bruce Lee. His aim was to develop a modern approach and get away from what he termed the "classical mess" of traditional martial arts.


Initially, termed Jun Fan Gung Fu, it was a development from his original style of Wing Chun. However, fighting with the larger Americans forced him to re-evaluate his art and he went on to develop JKD.


JKD has a conceptual approach: the art of combat through principles, not techniques. This made his art more adaptable.


From these core principles, he could develop a thousand techniques. In many ways it was a forerunner of modern MMA.


His aid and training partner whilst developing JKD was the legendary Dan Inosanto.


Bob Breen was fortunate to be the first student in Europe to study under Inosanto and spread his methods and is now widely regarded as the godfather of JKD and Kali in Europe.

What is Kali?


Kali is the ancient martial arts of the Philippines, dating back to before the

Majaphait Empire of the 5th and 6th centuries.


Though known as a stick fighting art, it is composed of numerous weapon and empty hand systems.


The roots of 4D Combat are based on Panantukan - the unique boxing/ kickboxing system of Kali. This is a form of ‘dirty’ or street  boxing, making it a highly effective all rounder combat art. This puts it at the core of the 4D Combat model.


Kali’s other systems that are included in the new 4D Combat evolution include knife defence skills and knife fighting art, plus single and double stick. 


Kali emphasises flow, improvisation and practicality. It is these aspects that have made the transition to 4D Combat.


Bob is one of the pioneers of modern Filipino martial arts and introduced seven Eskrima systems into the UK and many throughout Europe.