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A private military company (PMC) or private military and security company (PMSC) is a private company that provides armed combat and/or security services. PMCs refer to their personnel as "security contractors" or "private military contractors".
The services and expertise offered by PMCs are typically similar to those of governmental security, military, or police but most often on a smaller scale. PMCs often provide services to train or supplement official armed forces in service of governments, but they can also be employed by private companies to provide bodyguards for key staff or protection of company premises, especially in hostile territories. However, contractors that use armed force in a war zone may be considered unlawful combatants in reference to a concept that is outlined in the Geneva Conventions and explicitly stated by the 2006 American Military Commissions Act.
Private military companies carry out many missions and jobs. Some examples have included military aviation repair in East Africa, close protection for Afghan President Hamid Karzai and piloting reconnaissance airplanes and helicopters as a part of Plan Colombia. According to a 2003 study, the industry was then earning over $100 billion a year.
According to a 2008 study by the Office of the Director of National Intelligence, private contractors make up 29% of the workforce in the United States Intelligence Community and cost the equivalent of 49% of their personnel budgets.

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