# Mexico's Drug Cartels
> Mexico's Sinaloa Cartel and CJNG dominate global fentanyl and cocaine supply chains, driving a conflict that has killed more than 463,000 people since 2006.

**Meta:** type: reference · date: 2026-07-03 · heads:  · 5 takes · 4 lenses · 2 regions

## What it is

Mexico's drug cartels are transnational criminal organizations that control the production and trafficking of cocaine, heroin, methamphetamine, and fentanyl from Mexico into the United States and roughly 40 other countries. The two dominant groups as of mid-2026 are the Sinaloa Cartel and the Jalisco New Generation Cartel (CJNG). Both operate as diversified criminal enterprises: they tax legal businesses, run extortion rackets, traffic migrants, launder money through real estate and timber, and maintain armed militias capable of sustained combat with the Mexican military. Their combined footprint spans more than two-thirds of Mexico's territory and nearly all 50 US states.

## History

Modern Mexican cartels evolved from the Guadalajara Cartel, which dominated cross-border trafficking in the early 1980s until a DEA-led crackdown following the 1985 murder of agent Enrique Camarena. The Sinaloa Cartel emerged in the late 1980s under Joaquín "El Chapo" Guzmán and Ismael "El Mayo" Zambada, consolidating western Mexico's trafficking corridors. Through the 1990s and 2000s, rival organizations, including the Gulf Cartel, the Arellano-Félix Organization (Tijuana), and the Beltrán-Leyva Cartel, contested market share through cycles of violence and alliance. Mexican President Felipe Calderón declared war on the cartels in December 2006, deploying the military across 11 states. The campaign captured or killed 25 of 37 top cartel leaders by 2012 but generated more than 120,000 homicides and drove fragmentation rather than dissolution. CJNG split from the Sinaloa Cartel around 2010 under Nemesio "El Mencho" Oseguera and expanded aggressively, reaching two-thirds of Mexico's territory within a decade through extreme violence and a willingness to confront the state directly.

## Current state

As of July 2026, both dominant cartels are in contested succession. El Chapo was convicted in a US court in 2019; his son Ovidio Guzmán López was extradited to the US in 2023. In July 2024 El Mayo Zambada was arrested in El Paso, Texas, triggering a civil war between the Chapitos (Guzmán sons) and Mayos factions that escalated through early 2026, with kidnappings and killings rising monthly across Sinaloa and neighboring states. On 22 February 2026 the Mexican Army killed El Mencho in Tapalpa, Jalisco, with US intelligence support, an event covered in [击毙“埃尔门乔”的塔帕尔帕突袭引发CJNG在全墨西哥的报复](/zh/n/mexico-jalisco-operation-cjng-retaliation). His death opened a CJNG succession contest, with stepson Juan Carlos Valencia "El 03" as a disputed leader; recorded cartel attacks across Mexico reached 324 in June 2026. In February 2025, the Trump administration designated the Sinaloa Cartel, CJNG, Northeast Cartel, Gulf Cartel, and several others as Foreign Terrorist Organizations (FTOs), enabling broader financial and legal pressure. The cartels also launder revenues through commodity sectors, a pattern documented in [Mexican cartels run a $172m illegal-timber trade and launder it into the fentanyl supply chain](/zh/n/mexico-cartel-timber-laundering-2026) for illegal forestry. Total conflict deaths since 2006 exceed 463,000, with more than 130,000 disappearances.

## Relationships

The US-Mexico counter-narcotics relationship is the central external dynamic. The US appropriated US$3.5 billion under the Mérida Initiative between 2008 and 2021. The FTO designations of February 2025 escalated the legal and financial pressure on cartel networks, and US agencies embedded in Mexico's Joint Interagency Task Force provided the intelligence that enabled the El Mencho operation. Mexican President Claudia Sheinbaum, who took office in October 2024, has publicly rejected US calls for unilateral American military operations on Mexican soil while accepting intelligence sharing. The cartels source fentanyl precursor chemicals primarily from Chinese suppliers, producing finished opioids in clandestine Mexican laboratories before moving them north; border enforcement pressure in early 2026, reflected in [US-Mexico border encounters fall to their lowest level in more than 50 years under Trump administration enforcement](/zh/n/us-mexico-border-record-low-2026) crossing data, has forced the groups to adapt smuggling routes rather than reduce output.

## What to watch

- Whether CJNG holds together under contested leadership or fragments into competing regional groups, repeating the violent pattern of the Sinaloa split.
- The Chapitos-Mayos war expanding into new Mexican states and whether Sheinbaum's intelligence-led approach can contain it.
- US pressure for direct strikes on cartel infrastructure following expanded covert drone surveillance of fentanyl laboratories in Mexico.
- Whether the Trump administration moves to apply the FTO designation as grounds for secondary sanctions on Mexican financial institutions facilitating cartel money flows.

## Regional takes (batched by bias / lens)

### official record
- **US Drug Enforcement Administration, Cartels** (United States, en) — DEA's official profiles of designated cartel Foreign Terrorist Organizations, covering the Sinaloa Cartel and CJNG as primary fentanyl and methamphetamine suppliers to the United States.
  Source: https://www.dea.gov/cartels
- **DEA 2025 National Drug Threat Assessment** (United States, en) — Annual threat assessment designating Sinaloa and CJNG as top priorities; documents their presence in over 40 countries and their role as leading producers of fentanyl and methamphetamine.
  Source: https://www.dea.gov/sites/default/files/2025-07/2025NationalDrugThreatAssessment.pdf

### policy analysis
- **Council on Foreign Relations, Mexico's Long War: Drugs, Crime, and the Cartels** (United States, en) — Comprehensive backgrounder covering cartel history from the 1980s through 2026, US counter-narcotics spending, homicide totals, and successive Mexican government strategies from Calderon to Sheinbaum.
  Source: https://www.cfr.org/backgrounders/mexicos-long-war-drugs-crime-and-cartels

### organised-crime analysis
- **InSight Crime, Sinaloa Cartel Profile** (United States, en) — Institutional profile of the Sinaloa Cartel covering its origins, leadership succession after El Chapo's extradition, and the 2024 internal war between the Chapitos and Mayos factions.
  Source: https://insightcrime.org/mexico-organized-crime-news/sinaloa-cartel-profile/

### conflict data analysis
- **ACLED, How the Sinaloa Cartel Rift Is Redrawing Mexico's Criminal Map** (Global, en) — Data-driven analysis of territorial shifts following El Mayo Zambada's arrest, mapping rising attack counts by faction and contested corridors through mid-2025.
  Source: https://acleddata.com/report/how-sinaloa-cartel-rift-redrawing-mexicos-criminal-map

## Across the graph
- Related: [[mexico-jalisco-operation-cjng-retaliation]], [[mexico-cartel-timber-laundering-2026]], [[us-mexico-border-record-low-2026]]
- Entities: Mexico Cartels, Cjng, Sinaloa Cartel, Mexico, United States, Person:claudia Sheinbaum

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Canonical: https://rbtfl.xyz/zh/n/mexico-cartels-dossier