Columbia subject headings:
Mercenary troops--History--21st century.
Paramilitary forces--History--21st century.
Private military companies--History--21st century.
Private security services--History--21st century.
Security, International--History--21st century.
Harvard subject headings:
Mercenary troops--France.
Private military companies--France.
Princeton subject headings:
Mercenary troops--France.
Private military companies--France.