What does URL stand for?

The nature of the stand-up fighting depends on whether the combatants are unarmed or use mêlée weapons. For instance knives and batons provide substantially different effective ranges for striking. Batons become less effective at short, especially clinching range, where they cannot be swung properly. Knives on the other hand do not need as much thrusting space to generate damage. In stand-up fighting without mêlée weapons it is possible to separate the distances between the combatants according to which strikes can reach the opponent.