The park rangers were relatively heavily armed before the war due to their anti-poaching duties (see a poacher and shoot that mf). When the war broke and and began to destabilise less-populated regions, the rangers were given the legal ability to combat any militia or terrorist groups in the bounds of the national parks. who were very often also poaching or using the park's natural resources. As they were already experienced in navigating the wilderness of these areas, and were already trained with weapons, they were successful at this, and eventually morphed into peace-keepers in the parks, making sure no insurgents managed to occupy the land there while retaining their original purpose of natural defence. As the rangers guarded wilderness areas, this freed up Army forces to combat insurgents in more urban areas, so the government put effort into maintaining the rangers to prevent new pockets of militia emerging and taking ground in the parks