In military organizations, a pathfinder is a specialized soldier inserted or dropped into place in order to set up and operate drop zones, pickup zones, and helicopter landing sites for airborne operations, air resupply operations, or other air operations in support of the ground unit commander. Pathfinders first appeared in World War II, where they served with distinction, and continue to serve an important role in today's modern armed forces, providing commanders with the option of flexibly employing air assets.