This is the order of the Three Kingdoms, each kingdom volunteering men to serve in the Order. Each of the members must be an expert woodsman: able to survive in the Great Dark Oak Forest that borders all three Kingdoms.
The charter of the Order states that it shall protect the Great Dark Oak Forests from encroachment, stop all marching armies (any direction), and protect the people of the Three Kingdoms from Hellspawned creatures that come from the occasional Hellpit found there. To that end, the Order of the Oak patrols the Dark Oak Forest, the few Forest roads and paths, and the Forest borders. They train their members in the frightening and magical ways of Great Oak Forest, riding, combat with man and beast, and their mythical skill in running. They have created a network of way stations, cached camp sites, and warding stones, to aide them in this task.
There are currently a hundred and twenty dark green clad rangers protecting Humanity from the Forest and the Forest from Humanity.
The Symbol of the Order is three oak leaves in trifoli (every 120 degrees). Some members of the order will put a few silver/ gold/ red threads in one of the leaves, to show which country they are from.