Partisan

A partisan is an armed fighter, who is not part of the regular troops of a country or state. The term comes from Italian, where it meant member of a political party. There is no separate legal status for partisans in international law. The law of war uses four criteria to legally define someone as a prisoner of war, if the person is captured:
In 1977, there were two additional protocols: They clarified that it is sufficient to carry the weapons openly only on some occasions, to be titled armed combatant.