Battle Circle

The Battle Circle is a place in which Mandalorians engage in duels, and hone their combat skills in mock battles.

The rules of the battle circle are:

1. No deathblows are permitted. 2. Neither combatant is allowed to leave the Battle Circle. 3. The only weapons allowed are those permitted by the combatant who has the most honour. This can range from unarmed combat to any weapon depending on the choice of the more honourable combatant. 4. In order to fight champions, or former champions of the Battle Circle, one must impress one who was a champion of a particular battle circle at one point.

Source: Star Wars: Knights of the Old Republic II: The Sith Lords