United Nations Mercenary Convention
The United Nations Mercenary Convention, officially the International Convention against the Recruitment, Use, Financing and Training of Mercenaries, is a 2001 United Nations treaty that prohibits the recruitment, training, use, and financing of mercenaries. At the 72nd plenary meeting on 4 December 1989, the United Nations General Assembly concluded the convention as its resolution 44/34.
Source: Wikipedia — United Nations Mercenary Convention (CC BY-SA 4.0)