PsihoKekec
Swashbuckling Accountant
Unless local forests and hills are near mayor communications artery, then the opposing force can mostly ignore them until the main threats are dealt with. In the Russian civil war, the Greens controlled wast tracts of land, but Red Army only detached negligible forces to contain them until they dealt with Whites, Blacks and Poles, afterward they crushed them with overwhelming forces and terror.I also doubt that they understand that 'Bubby and his cousins' have been practice shooting their whole lives, and know the local forests and hills damn well.
It's almost like a perfect scenario for inflicting nightmare guerilla warfare on someone.
The key to winning the war is by taking the fight to your enemies and crushing them in their lairs, securing your locality is not the end goal but only the first phase, next is consolidation of forces and going onto offensive through unity of action.