Practice Relating to Rule 108. Mercenaries
Section A. Definition of mercenaries
Chad’s Instructor’s Manual (2006) states:
Mercenaries are people who take part in a conflict for personal gain and who do not belong to the armed forces of a party to the conflict or who have not been sent on an official mission by a country.
They enrol voluntarily in the armed forces of a belligerent State of which they are not nationals. … The use of mercenaries is not prohibited in the current state of international law.