This comprehensive reference work offers a detailed exploration of the vicious drug organizations that have enveloped Mexico in extreme violence since the 1980s. Organized alphabetically, the book features more than 200 entries on the major individuals and organizations that have dominated Mexico's booming illegal drug trade, as well as the Mexican armed forces and police units that have faced off against them in the escalating War on Drugs. The book opens with illuminating essays that provide context for Mexico's cartels and the long-running War on Drugs and explore the impact of the cartels on the United States. The A-Z entries that follow include such topics as Vincente Fox, "El Chapo" Guzman, the Golden Triangle, Operation Border Star, and the Sinaloa and Zetas cartels. Other entries focus on various anti-drug campaigns, crucial events, and weaponry favored by the cartels. The entries are augmented by an expansive chronology, a colorful glossary, and an extensive bibliography.