Fairbairn, Applegate and Biddle.
If you don't know who these men are, then research the names and pick up on their important contributions to the free world. They trained in Kung Fu, Jujitsu, Judo, etc. to add knowledge and bite to the base already developed around Western boxing and wrestling. The Oriental techniques were deemed very important by these men. They are still taught in our military forces to this day. The techs. used are for the most part not "Octagon friendly". They are largely derived from TRADITIONAL MA systems. Those moves can be found in KATA. Three examples are the knee to groin smash, the palm heel to nosebase or chin and the eye rip. KATA. A few compatible BJJ moves have even been added within the last 10-15 years.
The MMA competitions are great, but from a business standpoint they are not attractive to most average people looking for self defense. Cauliflower ears, missing teeth, etc. are what most people are wanting to avoid along with serious bodiy injury. A good traditional art can help them learn defense without as much serious injury risks. Why do I point this out? A LOT of MMA people are jealous of the Traditionalists being able to attract a larger clientele for lessons and actually make a decent living at it. This is one of the main reasons for some of the bashing that goes on that most don't talk about much. I have had first hand experience dealing with this, from a marketing standpoint, with my school (TKD) and some friends who tried to keep their MMA schools open. They have great personalities and are regionally easily at the top of their game, but they could not keep enough students long term due to the severity of contact and associated training injuries. I tained with them myself to pick up some different knowledge. I even found they were using some moves that are the same as moves in some of my Hyung (Kata). There is some bitterness about the business end of things that causes bashing of even legitimate traditional schools. Not just bashing of McDojangs. Some of you school owners know what I am talking about. There is a lot of smoke and mirrors from BOTH sides.
white belt