Mercenaries, pirates, and sovereigns: state-building and extraterritorial violence in early modern Europe. Princeton University Press, 1994. Describes the building of the modern state system through the states' "monopolization of extraterritorial violence." Underwood, Matthew. "Jealousies of a standing army: the use of mercenaries in the American revolution and its implications for Congress's role in regulating private military firms." 'Northwestern University Law Review 106 (2012): 317-349. Since 1970s Guy Arnold. Mercenaries: The Scourge of the Third World. Palgrave Macmillan, 1999. Doug Brooks & Shawn Lee Rathgeber. "The Industry Role in Regulating Private Security Companies", Canadian Consortium on Human Security – Security Privatization: Challenges and Opportunities, Vol. 6.3, University of British Columbia, March 2008. Anthony Mockler. Hired Guns and Coups d'Etat: Mercenaries: Thirty Years 1976–2006. Hunter Mackay, 2007. Anthony Mockler. The New Mercenaries: The History of the Mercenary from the Congo to the Seychelles. Paragon House, 1987. Robert Young Pelton. Hunter Hammer and Heaven, Journeys to Three World's Gone Mad, Jeremy Scahill. Blackwater: The Rise of the World's Most Powerful Mercenary Army, Nation Books, 2007. Peter J. Woolley. "Soldiers of Fortune," The Common Review, v. 5, no. 4(2007), pp. 46–48. Review essay. Status in international law Marina Mancini; Private Military and Security Company Employees: Are They the Mercenaries of the Twenty-first Century?, EUI Working Paper AEL 2010/5, European University Institute, San Domenico di Fiesole, 2010, . Katherine Fallah; Corporate Actors: the Legal Status of Mercenaries in Armed Conflict, International Review of the Red Cross, (2006) Eliav Lieblich; "The Status of mercenaries in International Armed Conflict as a case of politicization of International Humanitarian Law", Bucerius Law Journal, (2009) Private military companies (PMCs) Robert Young Pelton; Licensed to Kill: Hired Guns in the War on Terror, Crown, (2006), José Alvear Restrepo Lawyers' Collective; Private Security Transnational Enterprises in Colombia '' February 2008 External links The Security Contracting Network is resource and community of security contracting professionals. Corporate Mercenaries: War on Want's report on the threat of private military companies, November 2006 PMCs Monitor: An international organization which advocates for tighter rules The Working Group on the use of mercenaries as a means of violating human rights and impeding the exercise of the right of peoples to self-determination UNHCR Irregular military Private military contractors Protective service occupations Warfare of the Middle Ages