A New Dynamic in the Western Hemisphere Security Environment: Mexican Zetas and Other Private Armies
http://www.strategicstudiesinstitute.army.mil/pubs/display.cfm?pubID=940
Examines how the creation of professional private nonstate military organizations have mixed with crime and violence to form a security threat to Mexico and the U.S. From the Strategic Studies Institute of the U.S. Army War College.
