Night's Watch Ranger Vanguards roam the wilderness north of the Wall searching for enemies massing for assault against their strongholds. Once battle is joined, Vanguard functions well as medium cavalry, being particularly adept at flanking maneuvers and laying ambushes.
One might not think mounted troops can easily blend into a landscape, but Rangers Vanguards know the great taiga like few others. Think copses of trees, hidden dells, and even mild depressions in the terrain provide plenty of territory from which to launch devastating surprise attacks. Like all cavalry, Vanguards should be kept mobile, lest they be bogged down and destroyed.