Systema...
Funny style. In Germany, they do training in camouflage-pattern clothes and claim to teach a killer system, employed by Spetznas, GRU and the like.
Thanks to geographical and ethnological proximity to Russia, we have a lot of Russians over here. All have been to the Army, a few to the GRU and Spetznas (and they have all the tattoos, scars and photos to prove it). None of them has ever heard of Systema. In the Army, most did some boxing, weightlifting and wrestling. Very, very few practised Gok Sul (or Gjok Sul? I don't know the exakt name), mostly on a private basis and not as part of their regular training schedule.
I, personally, can refer to about 40 to 50 who I know personally.
Don Disco