Recent works of historians about the civil war focused on the action of «*greens*» in Russian countryside. The «*greens*» were huge masses of peasants in revolt against civil power and authorities, «*red*» or «*withes*», causing great troubles and disorganizing completely the economy. The main goal of this rural insurrections was the autonomy of rural communities.
So in a war game, it should be perhaps a nonsense to establish units of «*greens*», but perhaps zones affected by greens disorders should have a low level of loyalty and supply for both withes and reds, and causing some damages to production and moral in cities causing by anarchy and lack of supplies for civilians (in addition to famines, revolts, etc).
To suppress the greens, application of harsh measures («*red*» or «*white*» terror) by army units in rebel zones should be determinant, with installation of cheka or presence of leaders in urban center : cheka in particular, once established in a city, rather than combat capacities should have the ability to suppress rebellions and to obtain supply by plunder in zones around the cities, with the risk of revolts and recruits for the withes, Makhno, etc.