Continuing the WWII example, I think of partisans running sabotage operations while hiding out in the forests.

In contrast, if the actions look closer to those of literal Nazi collaborators, then there is only depravity in that. https://en.m.wikipedia.org/wiki/Khatyn_massacre

Partisans were kinda notorious for their actions against civilians - sometimes to punish collaborators (although in practice it would often be the entire village deemed collectively responsible if e.g. some partisans were betrayed there, and burned down), but often just targeting the infrastructure to deny it to the Germans even if that meant that civilians would starve to death etc. Here's one famous partisan hero-martyr: https://en.wikipedia.org/wiki/Zoya_Kosmodemyanskaya