I know the Siamese (Thai) fight with dual swords, and they are pretty good at it, too. It may look hard, but Thai fighting styles are nothing but simple, which is very useful when you are fighting in a life and dead situation. Check out this site!
http://www.krabikrabong.it/ You will find that in Thai fighting style, not only do you develop your skill, but you have to develop your attitute as well. Your attitute can determine whether you are a professional fighter or just an amateur, and it is critical in a real fight. It's like preparing someone for the war where you get them through psychological stress as well as physical one before sending them off to Vietnam, or whatever. You have to be mentally prepared. that's the difference between Thai fighting style and other style.