At one point, circa the mid-80's, I believe it was a 6-cornered civil war closer to the break-p of Yugoslavia than an "insurgency". I can remember reading some articles on how the "government" used an alternating hold and smash series of tactics: hold on 4 fronts and smash the 5th, then move on. To me, the Karen were the most interesting and used some moderately innovative tactics (the bicycle RPG anti-armour groups were intriguing).