Practice Relating to Rule 3. Definition of Combatants
Indonesia’s Air Force Manual (1990) states that combatants are:
a. Regular troops, i.e. members of the armed forces, consisting of:
1. voluntary troops;
2. compulsory military; and
3. foreigners, including citizens of neutral States, who belong to a belligerent’s armed forces.
b. Militias, i.e. volunteer groups or persons who, being a part of the armed forces, should be considered as regular troops with the status of legal combatant.
The manual also states that a person who is not a member of the armed forces nor a member of a militia but participates in the hostilities is an unlawful combatant.