A big complication is that on the one hand you have an identifiable army, on the other hand you have something akin to a militia/guerrilla where combatants and non-combatants are hard to ID often because one person can be both. When you have a resistance it get further muddied because like in WWII France, the resistance was civilians. So you can be a civilian and a combatant.

Things like what Milosevic or what Janjaweed leaders do are identifiable.