Private military company
A corporation that sells armed and security services — combat, training, close protection, logistics, intelligence — to states and other paying clients. It is incorporated and contracts under commercial law, presenting itself as a business, which sets it apart from both a state's regular armed forces and the lone mercenary. That business posture is the source of the accountability problem: international law on armed force was not drawn with it in mind, and most of the industry operates outside the formal frame.
A corporation that sells direct kinetic and security services — combat, training, close-protection, logistics, intelligence — to states and other paying clients, on terms that distinguish it from both the regular armed forces of any state and from individual mercenaries. The PMC is incorporated, contracts under defined commercial law, and presents itself as a business; the regulatory and accountability questions follow from that posture.
The contemporary PMC industry took shape in the post-Cold-War 1990s, when the drawdown of national militaries combined with surging demand for security in failing states. Executive Outcomes (South Africa) became notorious for its 1995 intervention in Sierra Leone, which demonstrated that small numbers of well-trained PMCs with helicopter mobility could swing African civil wars more effectively than UN peacekeeping. Blackwater (later Academi, later Constellis) became a quasi-permanent fixture of U.S. operations in Iraq and Afghanistan, with the Nisour Square massacre of 2007 marking the political limit of the model in a Western democracy. The Wagner Group ran Russian deniable operations from Syria to Mali to the war in Ukraine itself before its 2023 mutiny and effective dissolution into other Russian state-private structures.
The PMC sits awkwardly in international humanitarian law: the 1949 Geneva definition of "mercenary" was drawn narrowly enough that almost no PMC employee meets it, and the 1989 UN Mercenary Convention has been ratified by too few states to be effective. The result is a global industry operating largely outside the formal legal frame for armed force.
The recurring dissolution mechanism for the PMC is political reaction in the sponsoring state when an incident makes the model politically intolerable (Nisour Square for Blackwater; the Moscow march for Wagner). The model can absorb operational failure — accountability for kinetic incidents is famously thin — but it cannot survive a sponsor that decides the relationship has become a liability.